Russo-Ukrainian War: The 2S19 Msta-S 152mm SPH

Source: Russian Defense Ministry Press Service

     Somewhere in Russian occupied Ukraine, a Russian 2S19 Msta-S 152mm SPH (Self-Propelled Howitzer) moves into a position on October 29, 2025. The symbol on the hull front, below the blurred image of the driver, is what is sometimes termed as a “theater tactical” symbol. These are used to identify Russian vehicles from Ukrainian ones since in many cases, both sides are using the same equipment. This particular theater tactical symbol first appeared in May 2024 on Russian vehicles during combat actions in Kharkiv Oblast.

     The 2S19 is liberally draped in rubber panels made from conveyor belts. Fairly easy to obtain, conveyor belts often find use as appliqué armor where they are cut into pieces and applied as best possible to combat vehicles. The main purpose is to offer a small measure of protection from HEAT (High-Explosive Anti-Tank) munitions. The turret of the 2S19 has a metal frame to which the panels are hung and a portion of that frame can be seen above the turret. A panel hangs down from the front of the 2S19, protecting the lower glacis while panels on the sides of the 2S19 hang almost to the ground. Atop the entire turret is a camouflage net. What could be a video camera can just be seen attached to the visible portion of the metal frame.

     Since the 2S19 isn't meant to be on the front lines, relying on the range of its howitzer to keep it further back from the majority of prowling FPV drones, it doesn't carry the extensive anti-drone defenses seen on vehicles much closer to the front. Such defenses include drone jammers, more extensive screen armor, explosive reactive armor blocks, and wire/cable “spike” armor.

For more information on the 2S19 Msta-S, visit:

https://photosofmilitaryhistory.blogspot.com/2023/07/russo-ukrainian-war-2s19-msta.html

Russo-Ukrainian War: Artillerisystem 08 Archer 155mm SPH

Source: General Staff of the Armed Forces of Ukraine

     One of the more unique artillery systems in use by Ukrainian Army artillery units is shown here, the Artillerisystem 08. Better known simply as the Archer, this vehicle is in service with one of the four artillery battalions of the 43rd. Artillery Regiment “Hetman Taras Triasylo”. Sweden, as part of the country's military aid to Ukraine, has provided 8 Archer systems and in September 2025, pledged another 18 systems. Of the eight, one was damaged by a Russian drone attack on March 3, 2024 with a second destroyed on August 4, 2025. Designed by the Swedish company Bofors between 1995 and 2009, the Archer entered production in 2010, being built by BAE Systems AB. To date, only 48 Archer systems have rolled off the line with over twice that on purchase orders from the Latvian Land Forces, Swedish Army, and Ukrainian Army.

     The basis of the 34-ton Archer is the Volvo A30D articulated 6x6 vehicle chassis which is used in the civilian construction industry (usually as a dump truck). Power comes from a Volvo D9BACE3 inline-6, intercooled diesel engine with a turbocharger that develops 340 horsepower. This is mated to a Volvo PT1560 automatic planetary transmission with a 8-speed gearbox (6 forward, 2 reverse). Three Volvo AH64 axles feature transversal differential locks with full floating axle shafts. The driver can select 6x4 or 6x6 drive on the fly. The maximum road speed is 43 miles per hour while the top reverse speed is 8 miles per hour. 105 gallons of diesel fuel provide for a maximum operational range of 400 miles.

     Situated on the very back of the chassis is the heart of the Archer, a turret mounted Fälthaubits 77 (FH77) L/52 155mm howitzer. The turret is able to traverse a total of 170 degrees and elevate the gun to a maximum of 70 degrees. Total depression is 1 degree. Housed within the turret is a fully automatic gun loading system and electronic fuze setter. Total onboard ammunition is 21 shells with a total of 126 modular propellant charges. The shells have their own magazine while the propellant charges are in a separate magazine of 18 rows which contain 6 full charges and 1 half-charge. Once all of the ammunition is expended, it takes the crew 10 minutes to reload assuming they have the Archer-specific reloading device that moves ammunition from the accompanying munitions carrier into the magazines.

     The turret itself is unmanned and instead, the gunner operates it from the cab. A FCS (Fire Control System) utilizing NABK (NATO Armament Ballistic Kernel) software generates ballistic tables for any ammunition being used along with both tabular and graphical firing tables. The FCS also automates bringing the howitzer onto target, positioning the turret without manual guidance. This is assisted by a SAGEM Sigma 30 inertial navigation system (INS). The howitzer has several fire modes to include burst fire (3 rounds every 20 seconds), sustained fire (54 rounds every 35 minutes), bombardment (21 rounds in 3 minutes), and MRSI (Multiple Rounds Simultaneous Impact). With MRSI, the FCS calculates the trajectory then handles the firing of 4 to 6 rounds so that all rounds impact on the target at the same time. The Archer is compatible with any NATO standard 155mm projectile with standard HE (High-Explosive) shells having a range of around 19 miles, extended range HE shells reaching out to 25 miles, and M982 Excalibur guided shells can attain a range of 31 miles. If need be, the Archer can engage in direct fire, out to a range of 1.2 miles. Shell speed upon exiting the barrel is measured by a Weibel MVRS-700SC muzzle velocity radar. From the halt, the Archer can be ready to fire in under 30 seconds. Stability during fire missions is provided by two rear-mounted stabilizers. Likewise, the Archer can be ready to move to a new position, also in under 30 seconds.

     For local defense, a Vapenstation 01 RCWS (Remote Controlled Weapon Station) can be fitted to the cab roof. The Vapenstation 01 is the Swedish designation for the M151 Protector RCWS which can be fitted either with a Browning M2 12.7mm heavy machine-gun or a Mk.19 40mm automatic grenade launcher (among other weapon fits). While the Vapenstation 01 is not seen in the photograph, there are some Ukrainian Archers which use it.

     The Archer's cab (holding the 4 man crew) is protected by STANAG 4569 Level 3 steel armor which provides proof against 7.62x51mm AP (Armor-Piercing) ammunition at 30 meters as well as 155mm shell fragments from 60 meters. Below the cab, the Archer supports STANAG 4569 Level 2b mine protection which permits the Archer to survive the blast from a mine packed with at most 13 pounds of explosive. Air filters and a crew cab overpressure system provides NBC defense (Nuclear, Biological, Chemical). In the photograph, the Archer is covered by a Saab Barracuda MCS (Mobile Camouflage System) which consists of fitted panels which is a multi-spectral camouflage. It features a high UV reflectance, patterns that match NIR (Near IR) reflections of the surrounding environment, SWIR (Short-Wave IR) management by adjusting spectral reflections of the environment, TIR (Thermal IR) reduction (utilizing convection, reflection, radiation, and insulation), as well as providing protection against SAR (Synthetic Aperture Radar) systems.

Russo-Ukrainian War: "Office" of the 2S1 Gvozdika 122mm SPH

Source: inukraine.official on Instagram

     The “office” of a Ukrainian 2S1 Gvozdika (“Carnation”) 122mm SPH (Self-Propelled Howitzer), a screen shot from a social media video. The 2S1, first entering service in 1972, is the second oldest self-propelled gun currently in use with the Ukrainian Army. Only the 2S3 Akatsiya (“Acacia”) 152mm SPH is the oldest, having first entered service in 1971.

     The breech belongs to the vehicle's 2A18 122mm howitzer, a variant of the towed D-30 howitzer. The 2A18 uses a horizontal, sliding-wedge, semi-automatic breech. The latter means the empty shell case is automatically ejected from the breech after firing. One empty case can be seen on the turret floor. Above the breech are the howitzer's hydropneumatic recuperator system which assists in absorbing recoil energy after firing. The lever with the horizontal grip operates the breech while the more vertical positioned lever to the left of the breech with the round grip is a manual trigger for the howitzer. The curved plate above the howitzer is the barrel mantlet.

     Along the inside of the turret are racks for ready projectiles and propellant charge cases. All told, the turret holds 24 complete rounds (projectile + propellant case) while another 16 rounds are stored in the rear hull. Spent cases can be reused though they need to be returned to a ammunition manufacturer to effect the refurbishment. This includes a thorough cleaning followed by inspection for damage, deformity, or other flaws. After passing inspection, the case is provided with new primer and propellant charges.

     The loader's position is to the right of the gun and he is assisted with a power rammer whose tray and arm can just be seen at the far right of the image. The loader will first open the breech (it is closed in the image) then places the projectile into the tray. With a push, the loader slides the rammer apparatus so that it is lined up with the breech. After the loader hits the activation switch, the rammer engages and pushes the projectile into the breech. The loader next places the propellant case onto the tray, hits the activation switch, and the rammer pushes the case into the breech. At this point, the breech closes and the rammer apparatus automatically shifts to the right, out of the way of the breech. The howitzer is now ready to fire.

     The gunner sits to the left of the gun and he can just be seen at the very left edge of the image wearing a t-shirt (above and behind him is the commander). After quickly checking his targeting information, he pushes down on the vertical lever and this fires the howitzer. The empty propellant case is then ejected out of the breech and falls to the turret floor. The breech remains open, ready for the next shell.

     A trained crew can run up to 5 rounds per minute through the 2A18 but a more sustained rate of fire is between 1 to 2 rounds every minute.

Panzerhaubitze M109G (4. Batterie, Artillerielehrbataillon 145)

Source: Author's collection

     Most likely a publicity photograph, one gets a good view of the business end of a Bundeswehr Panzerhaubitze M109G self-propelled gun (SPG). Between 1964 and 1972, the Bundeswehr purchased a mixture of M109A1 and M109A2 SPGs from the United States. In two waves, the SPGs were sent to Rheinmetall AG who performed a myriad of improvements and adaptations to make them suitable for German service. The original 155mm howitzer was replaced with a Rheinmetall version which featured a new barrel, fume extractor, two-chamber muzzle brake, and a flat wedge breech block. The exterior appearance of the new gun still bore a resemblance to the original M109's short M126 155mm howitzer. The panoramic telescope and sighting scope were replaced with German optics while the M109G's commander was provided with a cupola and vision blocks taken directly from the M113 armored personnel carrier which was in use by the Bundeswehr. Other changes included replacing the 12.7mm M2 heavy machine-gun with the German built 7.62mm Maschinengewehr 3 (MG 3) and fitting German smoke grenade dischargers to the turret front.

     The M109G had a crew of six which consisted of the commander, driver, gunner, two loaders, and two ammunition handlers. The M109G was powered by a 450hp Detroit Diesel 8V71T turbo 8-cylinder, water-cooled engine paired with a 6-speed (4 forward, 2 reverse gears) Allison XTG-411-4A hydro-mechanical manual transmission. This was enough to move the M109G along at a top speed of 35mph with an operational range of 216 miles. The German howitzer had a maximum range of a little over 11 miles and a trained gun crew could sustain a rate of fire of one round every minute. The need for four men to feed the gun was due to the ammunition coming in two separate components; the shell and the bagged powder charge. Because of this, the M109G was only able to carry 28 rounds and thus relied on ammunition carriers to resupply it in the field as the onboard ammunition could be easily expended in a short period of time. Thus, having the extra hands allowed the M109G to be quickly replenished from ammunition carriers.

     As the M109G continued in service, it received one major upgrade in the early 1980s and that was to the M109A3GA1 standard. The gun was replaced with a longer barreled howitzer derived from the towed Feldhaubitze FH155-1 (which gave a maximum range of 15 miles), onboard ammunition capacity was increased to 35 rounds, IFAB (Integrierte Feuerleitmittel Artillerie Batterie) fire control system integration was added, and the installation of the AURORA (Autonome Richt- und Orientierungsaustattung Rohrartillerie; Autonomous Straightening and Orientation Equipment, Tube Artillery) targeting system enhanced the strike capability of the M109A3GA1. By the 1990s, the M109G was being phased out and replaced with the Panzerhaubitze 2000 but it was seen that the PzH 2000 would not be available in enough numbers to quickly replace the M109G and so 262 of the M109A3GA1 were given a further upgrade to the M109A3GEA2 standard. This included expanding the IFAB capability, improving the communication equipment, and incorporating the M109 into the ADLER (Artillerie-, Daten-, Lage- und Einsatz-Rechnerverbund; Artillery, Data, Situation and Deployment Computer Network) system. The ADLER system is a radio assisted artillery command, control, and weapon deployment network. To ease the burden of the loaders and ammunition handlers, a lifting aid and automatic loader was fitted but proved unreliable and so they were often disabled by the crew. The M109 was finally retired from German service in mid-2007.

     The content on the left side of the lower hull is the military symbology for the M109G's unit. The rectangle, called the frame in military terms, represents a unit. The squashed oval with the dot in the center represents a self-propelled howitzer or gun. The line to the right of the oval represents “gun system equipped” while the little line on top of the frame designates a battery. The number 4 is the battery the M109G belongs to while the 145 designates the battalion the battery belongs to. Thus, the unit would the 4. Batterie, Artillerielehrbataillon 145. This unit is no longer in existence with the current artillery units being Artillerielehrbataillon 131, Artillerielehrbataillon 295, Artillerielehrbataillon 325, and Artillerielehrbataillon 345. With the exception of Artillerielehrbataillon 295 (which is under the Franco-German Brigade), the other units are division level assets.

Russo-Ukrainian War: The AHS Krab 155mm SPG

Source: Ministry of Defense of Ukraine

     In all, the Ukrainian Army obtained a total of 108 examples of the vehicle shown here, the 48-ton Polish AHS Krab 155mm Self-Propelled Gun (SPG). As part of Poland's military aid to Ukraine, the country provided the first 18 vehicles which were received by the close of 2022. The remainder were obtained via purchase orders with Poland. The ArmatoHaubica Samobieżna (AHS; Self-Propelled Gun-Howitzer) Krab (meaning “Crab“ in Polish) is a joint development by the Polish company Huta Stalowa Wota (HSW), the British firm BAE Systems, and the South Korean entity Samsung Techwin. Work began on the Krab in 1997 and it finally entered production in 2016 with Polish artillery units receiving the Krab soon after.

     Samsung Techwin's contribution to the Krab is the PK9 chassis which is a variant of the chassis used by the South Korean K9 Thunder 155mm Self-Propelled Howitzer (SPH). Power comes from a MTU Friedrichshafen GmbH built MT881 Ka-500 8-cylinder, water-cooled diesel engine that develops 1,000 horsepower. This is paired to a Allison X1100-5A3 transmission with a 6-speed gearbox (4 forward, 2 reverse gears). On roads, the Krab can top out at 37 miles per hour while offroad, in favorable terrain, up to 19 miles per hour can be achieved. Enough onboard diesel fuel is carried to provide for a maximum operational range of 250 miles. The all-welded chassis uses tempered steel armor plating produced by the Australian company Bisalloy with a maximum thickness of 19mm. This provides the approximate equivalent to STANAG 4569 Level 4 protection which means the armor is capable of withstanding up to and including 14.5x114mm API (Armor Piercing Incendiary) ammunition at a minimum distance of 200 meters as well as shrug off 155mm artillery shell fragments as close as 25 meters. Of the five man crew, only the driver sits within the hull.

     The Krab's turret is much the same as that used on the British AS-90 155mm SPH which had been designed by Vickers Shipbuilding & Engineering, a division of BAE Systems. Like the hull, the turret supports the same Bisalloy armor and offers the identical STANAG 4569 Level 4 protection for the four men within. Situated within the turret is a HSW license built 155mm L/52 gun-howitzer. The gun mount provides for up to 70 degrees of elevation and 3.5 degrees of gun depression while the turret can fully traverse 360 degrees. The gun-howitzer uses a sliding block breech and there is a power loader which permits a burst fire rate of 3 rounds in only ten seconds. For three minutes, the Krab can fire 6 rounds for each of those minutes. A sustained fire rate is 2 rounds per minute. All told, the Krab holds 29 projectiles and 28 powder charges in the turret while the hull holds an additional 11 projectiles and 20 charges. The Krab can utilize any NATO compliant 155mm projectile to include the M982 Excalibur extended range, guided projectile. The latter can attain a range of 25 miles. A typical base bleed projectile can reach a maximum range of 19 miles. The gun-howitzer enjoys the benefit of a ZZKO Topaz FCS (Fire Control System) which consists of an automatic aiming system, ballistic computer, laser rangefinder, and both commander and gunner sights interlinked into the FCS. Outside the turret, situated on top of the gun mantlet, is a MVRS-700 SCD ballistic radar to measure the velocity of shells as they leave the barrel. In case of electrical failure, the turret can be manually traversed while the gun can also be manually elevated and depressed as well as loaded by hand. Also, should the Krab find itself in dire straits, it has a gunner's sight to allow it to engage in direct fire. For anti-air and local defense, the Krab can be fitted with a pintle mounted 12.7mm heavy machine-gun on the turret top.

     Other protective systems within the Krab include an automatic fire detection/suppression system while there is a filtered ventilation system that gives a measure of crew protection against biological, chemical, and radioactive substances and agents. The Krab also utilizes the OBRA-3 SSP-1 warning and self-defense system. This consists of external sensors which detect lasers that are “painting” the Krab. Such lasers are often utilized by anti-tank missile systems. The OBRA-3 will warn the crew and designate the direction the laser is coming from. In addition, the OBRA-3 is tied into the Krab's two banks of 81mm dischargers, each bank with four launch tubes. These banks are located on the turret front, one bank on each side of the gun barrel. The OBRA-3 can be set to automatically launch smoke grenades to obscure the Krab and interfere with the laser designator or if desired, the commander can manually trigger the grenades.

     Other systems include a FONET internal communication system for the crew (made by the WB Group), a RRC 9311AP RF digital radio station, FIN 311OL land navigation system, DD-9620 terminal for providing targeting data, GPS system, day/night sights for the commander and driver, and a 5.5 kilowatt output auxiliary generator (for powering the Krab with the engine off).

     The Krab shown here belongs to Operational Strategic Group Dnipro, likely within Tactical Group Kharkiv or Tactical Group Starobilsk which are the group's two subordinate units. The crew has added metal mesh anti-drone screens to the turret, decking, and hull sides. Cutouts have been made in the frontal turret screens to accommodate the 81mm grenade launchers. The Krab looks to have kept its original Polish Army camouflage paint pattern.

     As of September 9, 2025, the visually confirmed Ukrainian AHS Krab losses stand at 41. Of these, 35 have been destroyed beyond repair with the remaining 6 having suffered damage of varying severity.

Russo-Ukrainian War: The 2S7 Pion 203mm SPG

Source: Ministry of Defense of Ukraine

     Artillery in the Soviet Army is said to have earned the label the “God of War” from Iosef Stalin in a speech he gave some time in 1944. Even the U.S. Army's artillery branch considers itself the “King of Battle”. In the ongoing Russo-Ukrainian War, the undisputed “king” of artillery is shown here, the 2S7 Pion (“Peony”) 203mm self-propelled gun (seen here in service with the 43rd. Artillery Brigade “Taras Triasylo”). The 203mm 2A44 gun is one of the most powerful pieces of artillery currently in operational service in the world while the 2S7 itself is the largest self-propelled gun in theater. Both belligerents in the conflict operate the 2S7 with Russia also using the upgraded 2S7M Malka. Ukraine only operates the 2S7 because the 2S7M is exclusively a Russian modernization. Originally known in the West as the M1975, the 2S7 started full service with the Soviet Army in 1976 with production of the 2S7 ending in 1990. Sources differ on how many 2S7 rolled off the line but it ranges as few as 250 all the way up to 1,000.

     The 51-ton 2S7 is built upon a chassis (designated originally as Obiekt 216) that makes use of T-80 tank components and for an engine, it utilizes a V-46-1 turbocharged, liquid-cooled V-12 diesel motor that develops 840 horsepower. The engine is paired to a manual transmission with an 8-speed gearbox. The top road speed of the 2S7 is 32 miles per hour and enough fuel is carried to provide a maximum cruise range of no more than 404 miles.

     The heart of the 2S7 is its 2A44 203mm L/56 gun. With a weight of 8 tons, the barrel sits in a hydraulically powered cradle which permits a maximum of 60 degrees of elevation down to 0 degrees. The gun can be traversed 15 degrees to the left or right of center but any more requires the entire vehicle to turn. The 2A44 uses a 2-cycle screw-type breech. As the photograph shows, there is no gun shield to protect the crew when in operation. Speaking of crew, the 2S7 carries seven men (commander, driver, gunner, and the remaining being loaders) while another vehicle (typically carrying additional ammunition) contains another seven men who assist with transferring ammunition to the 2S7 when in action. The loaders are provided with a powered ammunition handling system that includes a rammer. This is positioned on the right rear of the vehicle. In the photograph, the soldier by the gun's breech is standing in the control platform for the system. The 2S7 only carries four rounds of ready ammunition which is the reason it is accompanied by a vehicle with additional projectiles and powder bags. A skilled crew, using the ammunition handling system, can maintain a rate of fire of 1.5  to 2 rounds a minute. The 2A44 barrel has a service life of 450 rounds before it should be replaced. If need be, the 2S7 can be loaded manually though the rate of fire is far less.

     The gunner is seated on the left side, also near the breech, but lower than the loader's station. At his position, he uses a PG-1M panoramic telescope to sight the gun for indirect fire and also has a K-1 collimator at his disposal. If forced to engage in direct fire, the gunner has a OP4M-87 telescope to aim with. The basic round for the 2S7 is the ZOF 43 HE-FRAG (High-Explosive Fragmentation) and the 2S7 can lob this 243 pound projectile to a maximum range of 23 miles. However, the Ukrainians have shot about all of their Soviet made ammunition and so most Ukrainian 2S7s are firing U.S. M106 HE projectiles that were used by the M110 8” self-propelled howitzer (which was retired in U.S. service in 1994). If provided with a RAP (Rocket Assisted Projectile), the 2S7 can achieve a range of 29 miles though this projectile is much lighter at 227 pounds. The 2A44 uses a pneumatic recuperator and has hydraulic recoil brakes. To help absorb recoil and assist with stabilization, a spade at the rear of the 2S7 is deployed. Due to the massive concussive shock wave when the gun fires, the 2S7 has a siren that sends out warning tones for five seconds before the gun fires. This gives soldiers near the 2S7 that do not have hearing protection or are near the muzzle area to protect their ears and/or get clear of the muzzle. A trained crew can have the 2S7 in action, from the halt, within 6 minutes and can have the 2S7 in traveling order within 5 minutes.

     The chassis of the 2S7 supports only 10mm of welded steel armor and this protects the cab, crew compartment, and other hull components such as the engine. This is only proof against some small arms calibers and artillery shell splinters. In the forward cab sits the commander, driver, and the gunner and the front windows can be covered with armored shutters. There are two cab roof hatches and the commander and driver have periscopes for vision when “buttoned up”. Behind the cab is the engine then behind that, a crew compartment where the loaders ride in with access by two hull top hatches. There is a overpressure-type NBC (Nuclear Biological Chemical) system along with anti-radiation liners for the cab and crew compartment along with a heater system for cold weather operations and crew comfort. To power systems with the engine off, the 2S7 has a 24-horsepower 9R4-6U2 APU (Auxiliary Power Unit). For communications, the 2S7 uses the R-123M and R-173 radio systems and a 1V116 crew intercom system.

     The 2S7 has no defensive armament outside of small arms carried by the crew though the 2S7 usually carries one to two 9K32 Strela-2 (NATO reporting name SA-7 Grail) MANPADS (Man Portable Air Defense System) to defend against aerial attack.

     The 2S7M Malka (a species of corydalis flower found in the Caucasus) appeared in 1983 with the main modifications being the ability to carry 8 rounds of ready ammunition, an improved ammunition handling system which can permit a sustained rate of fire up to 2.5 rounds per minute, usage of the V-84-B multi-fuel engine (which provided for more cruise range), updated R-173 radio systems, digital fire control system, and a reduction in crew to six.

     To date (April 7, 2025), the Russians have lost thirty-two 2S7/2S7M vehicles while the Ukrainians have lost thirteen 2S7 vehicles.

Russo-Ukrainian War: The Panzerhaubitze 2000 155mm SPH

Source: Ministry of Defense of Ukraine

     Perhaps the most advanced SPH (Self-Propelled Howitzer) in use by Ukrainian artillery units is the German designed and built Panzerhaubitze 2000 (PzH 2000; Armored Howitzer 2000). This particular PzH 2000 is being operated by the 43rd. Artillery Brigade “Taras Triasylo”. Developed by KNDS Deutschland and Rheinmetall, the PzH 2000 entered service in 1998. Ukraine has been provided, to date, with 28 PzH 2000 of which eight came from Dutch stocks and the remainder from Germany. Crew training commenced in May 2022 with the first deliveries of the PzH 2000 arriving in Ukraine starting in late June 2022. As of March 23, 2025, one PzH 2000 has been destroyed with another damaged.

     Power for the 57-ton PzH 2000 comes from a MTU MT881 Ka-500 diesel engine that develops 986 horsepower and this is paired to a Renk manufactured HSWL284C transmission. This provides for a maximum road speed of 41 miles per hour and off-road, terrain depending, up to 28 miles per hour can be achieved. Enough on-board fuel is carried to give the PzH 2000 a maximum cruise range of 260 miles.

     Of course, the crown of the PzH 2000 is its 155mm L52 howitzer and the automation and integration that surrounds it. The 4-man turret provides for a full 360 degrees of traverse while the gun mount permits for a maximum of 65 degrees of elevation and 2.5 degrees of depression. Housed within the hull is a magazine holding 60 rounds of ready projectiles and in the turret is a fully automatic ammunition handling system that draws projectiles from the magazine and loads them via a transfer arm and pneumatic flick rammer. In the back of the turret (behind blast doors) are the propellant bag charges, 288 of them, which are handled by the two loaders. The propellant compartment is air-conditioned to keep the bags at optimal temperature. The fuzing for each projectile is automatically set prior to loading into the breech. A trained crew can burst fire 3 rounds in ten seconds, empty half the magazine in five minutes, or fire the entire 60 rounds in ten minutes.

     In order to provide pin-point accuracy, the PzH 2000 utilizes a fire control computer (FCC) with a integral ballistics calculator. The FCC is coupled to a navigational system and secure channel communications node which can receive target data from higher echelon units or artillery control systems. Using an electrical gun laying system, the howitzer can be brought to bear on target automatically using coordinates provided from the FCC. It should be noted that gun laying and loading can be manually done if there is some failure in the automatic systems. Also, the gunner or commander can utilize a semi-automatic firing mode if desired. If need be, the PzH 2000 has an optical sight for the gunner to allow him to engage targets in direct fire out to 1.2 miles.

     Range for the PzH 2000 depends on the 155mm projectiles being used. The basic German DM121 HE-FRAG (High-Explosive Fragmentation) projectile can be shot to a range of 19 miles while the South African produced M1711 HE-FRAG base bleed projectile can attain a maximum range of 25 miles. Finally, the Rheinmetall M2005 V-LAP (Velocity-enhanced, Long-range Artillery Projectile) is a rocket-assisted projectile (RAP) that can reach out to 34 miles. The PzH 2000 can also fire the U.S. made M982 Excalibur guided munition with the M982A1 being able to strike targets at 31 miles. Finally, the PzH 2000 can also fire the Leonardo (an Italian company) Vulcano GLR (Guided Long Range) projectile out to 43 miles. The FCC and fire control system (FCM) permits the PzH 2000 to conduct Multiple Round Simultaneous Impact (MRSI) fire in which several rounds are fired in a sequence which will have all fired rounds impacting the target at the same time. A “shoot and scoot” fire mission can be done in 1 minute, 40 seconds. This includes 25 seconds to get into action, 1 minute to fire 10 rounds, and 15 seconds to secure the PzH 2000 and move out.

     For protection, the PzH 2000 uses welded steel armor. Though the exact thickness is classified, it is said that the hull and turret can resist up to and including some 14.5mm heavy machine-gun ammunition. The turret roof can be fitted with passive add-on armor (seen in the photograph) to provide a measure of protection against drone-dropped munitions and light caliber mortar rounds (60mm for example). Other protective features include internal spall liners, automatic fire extinguishing systems in the crew and engine compartments, NBC (Nuclear Biological Chemical) protective system, and optional smoke grenade launchers (also seen here). The PzH 2000 can also be fitted with a machine-gun for local defense.

     Other systems in the PzH 2000 include a laser range finder, day/night optics for the driver and commander, APU (Auxiliary Power Unit) to power systems with the engine off, GPS navigation system, BITE (Built-In Test Equipment) to rapidly assess vehicle status, and a phased array radar in the front upper hull to measure muzzle velocity.

     In Ukrainian service, the PzH 2000 quickly showed that it was not capable of withstanding the volume of fire that typifies the Russo-Ukrainian War. According to KNDS/Rheinmetall, 100 rounds every 24 hours is considered the maximum the PzH 2000 can handle. As an example, a LawfareMedia.org article published on April 3, 2024 stated that at a minimum, Ukrainian artillery units need at least 20,000 shells per day, per gun tube, for them to maintain operational capacity. In 2023, Ukrainian artillery fired between 4,000 to 9,000 rounds per day (the Russians tripled or even quadrupled that). Thus, PzH 2000 equipped units often fired well over the 100 projectile limit and this led to breakdowns of the automatic loading system. Since repairs such as this could not be done in Ukraine, it meant shipping the PzH 2000 vehicle(s) to Lithuania and the consequence was the PzH 2000 was out of action for weeks. Another issue was that some Ukrainian artillerymen “hot loaded” projectiles which meant using powder charges over the maximum limit in order to boost range but induced more rapid wear on the gun barrel, breech, and recoil mechanisms.

Russo-Ukrainian War: The 57mm AZP S-60

Source: inukraine.official on Instagram

     The Russo-Ukrainian War is, for anyone that follows the weapons deployed by both Ukraine and Russia, a war of old and new arms technology. Both sides utilize weapons that saw manufacture in World War Two and built in the following decade past 1945. One example is shown here, the AZP S-60 57mm anti-aircraft gun. Standing for Avtomaticheskaya Zenitnaya Pushka (Automatic Anti-Aircraft Gun), the AZP S-60 first appeared in prototype form in 1946 and was accepted for service in 1950. Originally designed as a short- and medium range anti-aircraft gun, it is woefully obsolete in that role today without modern upgrades such as fully powered gun controls, improved ammunition,k and guidance systems. Instead, both the Ukrainians and the Russians are primarily using the AZP S-60 on ad-hoc self-propelled mountings as a rapid fire, short range artillery gun.

     Normally, the AZP S-60 is mounted on a four-wheel carriage with outriggers to stabilize the platform when in action. The centrally mounted turntable permits 360 degrees of traverse while the gun mount allows for 85 degrees of maximum elevation and 4 degrees of depression. The combat weight of the AZP S-60 is five tons and a full crew consists of seven men. A 7mm thick gun shield offers a measure of protection to the gun crew from light small arms calibers and shell splinters. Typical gun crew in action is four men of which three are provided with seats (commander and two gunners to operate the power assisted, manual traverse and elevation/depression controls) and a loader. The remainder of the men are typically ammunition handlers, pushing clips to the loader. Speaking of clips, the AZP S-60 is fed from four-round clips which are pushed into a horizontal loading tray on the left side of the weapon. A well trained crew can maintain a sustained rate of fire of 70 rounds per minute though the AZP S-60 is capable of 120 rounds per minute.

     The series of photographs here are screen captures from two different videos showing Ukrainian AZP S-60 crews in action, both posted on social media in February and March 2025. The first two show one of the self-propelled mountings, this particular one using a KamAZ-4310 6x6 truck. This is a typical mount, simply placing the gun and turntable onto a flat deck. The gun shield's upper half is folded down to lower the profile while to the left of the image (as one looks at it), the seat for the gunner can be seen along with the dual controls that raise and lower the gun. It is this gunner who fires the AZP S-60 via a foot trigger. Wooden crates of ammunition are lashed down to the bed. On the roof the KamAZ-4310's cab are at least two drone jammers. The next image shows the gun in action. The loader and commander are holding onto the traverse controls as the gun recoils and causes the truck to rock. The seat for the gunner who would have managed the traverse and the commander's seat (in the middle) have been removed though their mounts can be seen by the feet of the commander. As the gun is being used for indirect fire, to the right of the image is a panoramic periscope sight to enable the gunner to aim the weapon. Also of note, just behind the loader is a ready rack with a full clip for him to grab and load once the weapon is empty.

     The second set show a AZP S-60 crew from the 112th. Territorial Defense Brigade preparing their gun for action while on a firing range. They are firing the UOR-281U HE-T (High-Explosive Tracer) ammunition. The sequence shows one of the ammunition handlers pushing the 4-round clip into the breech while the last image shows the loader cocking the charging handle. At this point, the weapon is ready to fire. Using such ammunition, the maximum range is around 3.8 miles.

Russo-Ukrainian War: DITA 155mm SPH

Source: Public Affairs, 12th. Special Operations Brigade

     The Netherlands has provided Ukraine with nine DITA 155mm self-propelled howitzers (SPHs) and this is one of them, in service with the Artillery Group, 12th. Special Operations Brigade “Azov”. The DITA (Digital Integrated Targeting Artillery), built by the Czech arms manufacturer Excalibur Army, entered production status in 2023 and it shares a high level of commonality with another Excalibur Army product, the DANA M2 152mm SPH. The key difference is the caliber of the howitzer. The DANA M2 uses a 152.4mm howitzer, a caliber that is mainly unique to artillery from the former Soviet Union, from former Warsaw Pact countries, and currently from the Russian Federation. The DITA, on the other hand, uses a 155mm howitzer which is the standard caliber across most NATO countries and thus is capable of firing any compatible 155mm projectile regardless of the country of manufacture. Both calibers still find widespread use in military forces around the world, to include Ukraine which fields self-propelled guns and towed artillery using both 152mm and 155mm calibers, the latter typically coming via military aid from NATO countries. In addition to the nine, the Netherlands has pledged to provide another six DITA. 

     The 29-ton DITA uses a Tatra 815 VP31M 8x8 wheeled truck chassis which uses a Tatra T3C-928-90 12-cylinder, air-cooled, turbocharged vee diesel engine that develops 408 horsepower that is mated to a Tatra Norgren 10-TS-210N semi-automatic transmission. The gearbox has 12 speeds: 10 forward, 2 reverse. This provides the DITA with a top road speed of 55 miles per hour and in optimum off-road conditions, the maximum speed is 15 miles per hour. Off-road performance is improved through a central tire inflation system (CTIS). Enough diesel fuel is carried to give the DITA a maximum cruise range of 372 miles.

     The main weapon is a 155mm L45 howitzer situated within a centrally mounted turret. The mount permits a maximum howitzer elevation of 70 degrees and 3 degrees of depression. The turret does not provide a full 360 degrees of traverse, offering only a total of 60 degrees of total traverse. The DITA has outriggers to stabilize the vehicle when firing from the halt with hydraulics that can quickly deploy and retract to enable the DITA to be ready for firing fast and move just as fast once the fire mission is complete. The DITA uses much the same electronics from the Czech company Retia that equips the DANA M2. In regards to the howitzer, the ASAP (Automatic Setting of Action Position) system permits the DITA to fully automate firing data calculations which in turn directs the turret to traverse and the gun mount to lay the howitzer at the optimum elevation to engage the target. The ASAP system also selects the appropriate ammunition from the 40 rounds carried in the DITA's 40-round automatic loader. Both the commander and the gunner are provided with a digital fire control system (FCS) that tie into the ASAP system. The DITA can be manually aimed using a ZZ-73 mechanical sight, a PG-1M-D panoramic telescope, a K-1 collimator, and a PAB-2A artillery compass. These are calibrated for the 155mm caliber. For manual direct fire, the gunner would use a OP-5-38D telescopic sight. With the automatic loader, the DITA can fire up to 6 rounds in the first minute with a sustained rate of 5 rounds per minute. It is known that some of the DITAs in Ukrainian service are firing the U.S. made M107 155mm HE (High-Explosive) projectile. The M107,which remains in production despite being introduced in 1959, has a weight of 95 pounds with a M739 fuze of which 14.6 pounds is Composite B explosive. Upon detonating, the M107 can produce almost 2,000 fragments. With a full powder charge, the M107 has a maximum range of 12 miles and if using a base bleed M107 variant, the range can be extended out to 20 miles. Of course, the 155mm L45 howitzer can fire RAP (Rocket Assisted Projectile) shells which can reach a maximum range of 24 miles. Unlike the DANA M2, the DITA is not fitted with a heavy machine-gun for anti-air or local defense. Instead, the DITA has to rely on any small arms carried by the crew.

     For armor, the cab is protected to STANAG 4569 Level 1 standard. This is proof up to 5.56x45mm and 7.62x51mm ball ammunition at 30 meters and against 155mm artillery shell fragments at 100 meters. Against explosives, the armor can protect against hand grenades and small artillery fragmentation submunitions. The turret is not armored as the howitzer can be operated from within the cab. The cab is also NBC (Nuclear Biological Chemical) protected and crew comfort provided by a heater and air-conditioning system. Speaking of crew, the DITA can be operated with as few as two men though three is the usual compliment.

     Other systems mounted on the DITA include 24 volt water-cooled auxiliary power unit (APU) paired to hydraulic pump which permits the vehicle's electrical systems to work and the pump allows the gun controls to function if the engine is turned off or broken down. If even the APU fails, the howitzer has manual controls which can be used to aim, load, and fire the howitzer. The driver is provided with a Retia digital diagnostics system to monitor critical systems as well as a video system to enhance situational awareness while driving. A Retia digital communications suite includes a C2I (Command, Control & Intelligence) function, VHF/UHF tactical radio station, and a intercom system for the crew. A Retia inertial navigation system is backed up by a GPS (Global Positioning System) and this is also tied into the ASAP system.

Russo-Ukrainian War: DANA M2 152mm SPG

Source: Ministry of Defence of Ukraine

     Belonging to one of the two self-propelled artillery battalions of the Artillery Group, 56th. Motorized Brigade “Mariupol” is this DANA M2 152mm self-propelled howitzer. Standing for Dělo Automobilní Nabíjené Automaticky (literally “gun on truck loaded automatically”), the DANA M2 is a Czech modernization of the Samohybná Kanónová Húfnica vzor 77 DANA (ShKH vz. 77 DANA; Self-propelled Howitzer Model 77) which entered service in 1981. The modernization is done by the Czech arms company Excalibur Army. Ukraine had purchased 30 DANA M2 vehicles and as of February 12, 2025, none have been lost in combat.

     The 30-ton DANA M2 uses a newer Tatra 815 8x8 wheeled truck chassis which uses the more powerful Tatra T3-930-52M 12-cylinder, air-cooled vee diesel engine that develops 355 horsepower that is mated to a Tatra Norgren semi-automatic transmission. This provides the DANA M2 with a top road speed of 55 miles per hour and in optimum off-road conditions, the maximum speed is 15 miles per hour. Off-road performance is improved through a central tire inflation system (CTIS). Enough diesel fuel is carried to give the DANA M2 a maximum cruise range of 372 miles.

     The main weapon is a 152.4mm howitzer situated within a centrally mounted turret. The mount permits a maximum howitzer elevation of 70 degrees and 4 degrees of depression. The turret does not provide a full 360 degrees of traverse, offering a maximum of 225 degrees of total traverse. Traverse is lesser if the howitzer is at full elevation, being limited to 45 degrees of total traverse. The DANA M2 has outriggers to stabilize the vehicle when firing from the halt with hydraulics that can quickly deploy and retract to enable the DANA M2 to be ready for firing fast and move just as fast once the fire mission is complete. Excalibur Army was not stingy in equipping the DANA M2 with electronics from the Czech company Retia. In regards to the howitzer, the ASAP (Automatic Setting of Action Position) system permits the DANA M2 to fully automate firing data calculations which in turn directs the turret to traverse and the gun mount to lay the howitzer at the optimum elevation to engage the target. The ASAP system also selects the appropriate ammunition from the 36 rounds carried in the DANA M2's 36-round automatic loader. A further 4 rounds plus charges are stored in the turret. Both the commander and the gunner are provided with a digital fire control system (FCS) that tie into the ASAP system. The DANA M2 can be manually aimed using a ZZ-73 mechanical sight, a PG-1M-D panoramic telescope, a K-1 collimator, and a PAB-2A artillery compass. For manual direct fire, the gunner would use a OP-5-38D telescopic sight. With the automatic loader, the DANA M2 can fire up to 5 rounds in the first minute with a sustained rate of 4 rounds per minute. Ukraine does utilize Czech ammunition and so the usual munitions are the 152-EOF HE (High-Explosive), DN1CZ HE-ER (High-Explosive Extended Range), and the 152-EPrSv HEAT (High-Explosive Anti-Tank) shells. The HE shell has a maximum range of 11 miles while the DN1CZ shell can attain a range of 16 miles. For direct fire using the HEAT round, the typical effective range is 1.2 miles. The DANA M2 is fitted with a 12.7mm NSVT heavy machine-gun for anti-air and local defense in addition to any small arms the crew may have.

     For armor, the cab is protected to STANAG 4569 Level 1 standard. This is proof up to 5.56x45mm and 7.62x51mm ball ammunition at 30 meters and against 155mm artillery shell fragments at 100 meters. Against explosives, the armor can protect against hand grenades and small artillery fragmentation submunitions. The turret is not armored as the howitzer can be operated from within the cab. The cab is also NBC (Nuclear Biological Chemical) protected and crew comfort provided by a heater and air-conditioning system. Speaking of crew, the DANA M2 can be operated with as few as two men though three is the usual compliment with room in the cab for 1 to 2 passengers.

     Other systems mounted on the DANA M2 include 24 volt auxiliary power unit (APU) paired to hydraulic pump which permits the vehicle's electrical systems to work and the pump allows the gun controls to function if the engine is turned off or broken down. The driver is provided with a Retia digital diagnostics system to monitor critical systems as well as a video system to enhance situational awareness while driving. A Retia digital communications suite includes a C2I (Command, Control & Intelligence) function, VHF/UHF tactical radio station, and a intercom system for the crew. A Retia inertial navigation system is backed up by a GPS (Global Positioning System) and this is also tied into the ASAP system.

Russo-Ukrainian War: The 2S19 Msta-S

 

     I am no expert on current Russian military tactics. However, I do have access to IAG-13-U-78 “Soviet Army Operations”, dated April 1978. This is an intelligence manual created by U.S. Army Intelligence and released by the U.S. Army Intelligence and Security Command. Now, I hear you say, of what good is a manual nearly 44 years old? If one examines the chapter on attacking a defending enemy (Section IV, page 3-61), there are some clear parallels to the current situation in Ukraine which suggests that the tactics referenced in this publication aren't so out of date after all.

     Russian forces are reported to have largely bypassed Kharkiv in order to push deeper into Ukraine. This lines up with the tactic of bypassing an enemy in a deliberate defense (of which a city can be considered such) rather than engage it. This may account for lighter forces around the city and use of artillery to keep the defenders in the city. It is doubtful that a concentrated Ukrainian force would engage the Russians in open terrain and lose the benefit of the concealment and cover a urban warzone provides them. As such, outside of aerial attack or artillery, Russian forces are a bit more secure from massed infantry assaults.

     Let us move to Kyiv. It is reported that a military convoy some 40 miles long is moving towards the city. This lines up with the first action in the manual that states the first step towards an attack of an enemy in deliberate defense is the buildup of required forces. If, indeed, the convoy is slated for the assault on Kyiv, the evidence is clear. Once the forces are in the field of battle, they will be organized. If they are following the 1978 tactics, the bulk of the forces will be amassed at the planned direction of attack. Russian tactics also allow for feints or ruses to divert the enemy attention away from the main thrust. In such attacks, the Russians, according to the manual, want to have a 4-5 to 1 advantage in troops, 6-8 to 1 in artillery, and 3-5 to 1 in tanks. This is certainly achievable today and likely has not changed much.

     The Russians, as they have been since World War II, are big believers in massed artillery and rocket batteries (as seen in the superiority ratio above) and prior to the commencement of the attack, Kyiv would be subjected to a heavy bombardment. In the attack, again, if following these tactics, the Russians will not spread their forces out but instead would reduce unit frontages and have a front line of no more than 4km. Follow-on units behind the main lines would be spread further apart. This allows them to maximize their firepower and focus it towards the enemy. It is possible that the incursions in the suburbs of Kyiv by Russian forces are reconnaissance to attempt to pinpoint Ukrainian positions and capability in preparation of the main attack.

     The only hope for the Ukrainian defenders in Kyiv is to withstand the initial assault and bog the Russians down which would break their momentum. Why is this important? According to the manual, the tempo of the attack is to be swift with a fast rate of advance to limit losses and overrun weak positions quickly. If it becomes a brutal, house-to-house fight, it favors the defender who knows the terrain and if Russian objectives are not achieved, it may become a serious problem.

     One of the self-propelled artillery assets the Russians have deployed in Ukraine is the 2S19 Msta-S (after the Msta River). This particular example was abandoned somewhere in Sumy Oblast after the convoy it was traveling with was hit. As one can see, the travel lock for the 2A65 152mm howitzer is still engaged. The gun can fire base bleed shells out to 16 miles or if using rocket assisted ammunition, out to 18 miles. Thanks to a automatic loader, the standard 2S19 can fire up to 8 rounds every minute. A total of 50 rounds of ammunition is carried in the vehicle. The turret has a full 360 degree rotation while the gun can be elevated up to 68 degrees and depressed to a maximum of 4 degrees. For defense, the 2S19 is fitted with a pintle mounted 12.7mm NSVT heavy machine-gun (not seen here) with 300 rounds of ammunition. Built on a T-80 main battle tank chassis, the V-84A 840 horsepower engine can move the 2S19 to a maximum speed of 37 miles per hour (on roads) with a power to weight ratio of 20 horsepower per ton. Speaking of weight, loaded, the 2S19 is 42 tons, is 23.5 feet long, 11.1 feet wide, and 9.10 feet tall with a crew of 5. Armor thickness is unknown but while proof against small arms fire, it would be no defense against anti-tank missiles. It is NBC (Nuclear, Biological, Chemical) protected.

     The 2S19 entered service in 1989 and the Ukrainian army had 40 of them as of 2017 though how many remain in service isn't known. However, it is highly likely this abandoned one will be turned around against its former owner.

Originally posted on March 1, 2022.

British Stuart: Ad Hoc 18-pdr Field Gun Portée

From British and American Tanks of World War Two by Peter Chamberlain and Chris Ellis.

      Although the M3 light tank was U.S. designed and built, it was the British who first took it into action during Operation Crusader which commenced on November 18, 1941 in northern Africa. In British service, the M3 was known as the Stuart and for Operation Crusader, 170 Stuart I light tanks were included in the order of battle for the British 8th. Army. As the battle unfolded, units equipped with the Stuart suffered significant casualties. This, despite the fact the Stuart compared very favorably against two of the most common Axis tanks, the Panzerkampfwagen III Ausf G and the Italian Fiat M13/40. Against the former, the two tanks were evenly matched in terms of speed and armor protection and both the Stuart's 37mm M6 gun and the PzKpfw III's 3.7cm KwK 36 gun could knock the other tank out from over 1,000 meters. Against the Fiat, the M3 dominated the Italian medium tank and the Stuart was invulnerable to the 47mm Cannone da 47/32 AT gun from 1,000 meters and beyond whereas the Stuart could penetrate the M13/40 almost anywhere at that range. Analysis following the Allied victory against Axis forces on December 30, 1941 showed that the high casualty rate had more to do with the skill of German tank crews and superior tactics. The British also found that the two-man turret of the Stuart was problematic, to the point that some Stuart crews tried to squeeze a third man in to facilitate gun handling. The Stuart also did not have a high fuel capacity in comparison to some British tanks (such as the Crusader) which limited its range to only 75 miles. Still, the British appreciated the mechanical reliability of the Stuart and excellent speed. Nevertheless, by mid-1942, the British relegated the Stuart to reconnaissance tasks only, avoiding tank-vs-tank combat wherever possible. The British continued to use the Stuart throughout World War Two. Subsequent models were the Stuart II (Guiberson diesel engined M3), Stuart III (M3A1), Stuart IV (Guiberson engined M3A1), Stuart V (M3A3), and the Stuart VI (M5 and M5A1).

     The British also used a number of variants of the Stuart and two of the most common were the Stuart Recce and the Stuart Kangaroo. The Stuart Recce removed the turret which lowered the profile of the tank and lowered the weight of the vehicle which in turn, improved range. The Stuart Kangaroo also removed the turret and the vehicle was used as an armored personnel carrier (APC). There is debate on if the name “Kangaroo” was ever applied to the Stuart like it was to other similar vehicles derived from the M7 Priest, M4 Sherman, and Canadian Ram tank. These APCs were mostly used by British engineer units attached to armored brigades. A third, relatively common variant, was the Stuart Command which was also a turret-less Stuart but utilized by commanders and was equipped with additional radio equipment.

     This, then, brings us to the subject of the photograph. It depicts a one-off modification to a Stuart in which a British Ordnance QF 18-pounder field gun, sans wheels, was fitted to a simple bracket mount in place of the tank's turret. Although many of these guns were converted into the improved QF 25-pounder gun prior to World War Two, a number of the older guns (which entered service in 1904) remained in service and saw action during the opening stages of the North African campaign. Whether this ad hoc self-propelled gun (or portée) was ever used in action remains unknown but it was certainly constructed during the North African campaign in 1941-42. An examination of the mounting suggests that the gun was centered on the upper hull with the box trail extending over the opening left by the removal of the turret. This would allow the gun to be elevated to a maximum of 37 degrees and permit recoil. Of course, this assumes the gun is the Mk. III or Mk. IV model. If, on the other hand, the gun was an older Mk. I or Mk. II with a single, central trail, then the maximum elevation was only 16 degrees. The gun crew would have operated the gun without the benefit of all-around protection with the only measure of defense coming from the gun shield. It appears that two of the three hull machine-guns (one front hull mounted and one in each side of the upper hull) were removed, likely to make room for ammunition. This left only the front hull machine-gun. If the intent was to provide mobility for the gun and its 6.3 mile range was its defense from enemy attack, then having the additional machine-guns wasn't needed and if need be, crew small arms could also be utilized for close-in defense. How much ammunition the modified Stuart could carry isn't known though with the shell being a little over 1 foot long, an adequate supply could likely have been stowed if the machine-guns and the ammunition for them was removed. How the crew entered the SPG is also not known. It may have been possible for the crew to slip underneath the trailing arm or perhaps the trailing arm was not secured to the rear deck and the gun could be tilted upward to permit the crew to enter. Certainly in action, three men would likely have been crewing the gun from the deck while another remained in the tank, passing ammunition up through the opening where the turret had been. Some have said the modified Stuart was used as an assault gun, utilizing the gun for infantry support in the direct fire role. However, this is unlikely given the high profile of the SPG, the lack of armor protection for the gun crew, and the relatively light armor of the tank itself.

The M-1978 Koksan: North Korea's 170mm Self-Propelled Gun

A former Iranian M-1978 captured by Iraq during the Iran-Iraq War being towed away by U.S. Marines.

     The M-1978 “Koksan” is a rather unusual self-propelled gun (SPG) in a number of aspects. Built by the Second Machine Industry Bureau of North Korea, the SPG uses the chassis of the Chinese built and supplied Type 59 main battle tank (itself a Chinese version of the Russian T-54A tank) and mates it with a 170mm gun. The gun itself is a bit of a mystery given the caliber. Some sources say it was derived from a Russian naval gun except that the Russians never used any such caliber. The closest is the 180mm M1931/M1932 pattern naval gun. Other sources say the gun is some form of copy or version of the World War 2 German 170mm Kanone 18 or at least designed to fire captured stocks of 170mm ammunition supplied by Russia (which doesn’t seem completely plausible). 

     However the North Korean military arrived at the 170mm, the SPG first appeared to Western eyes in a military parade in 1978 held in Koksan County, located in North Hwanghae Province. Since the actual designation for the SPG is not known, Western intelligence analysts gave it the name M-1978 Koksan after the year and place it was first seen. The Koksan was one of the first weapon systems North Korea exported and the only foreign buyer was Iran who purchased a number of them in 1987 and they saw action during the Iran-Iraq War (September 22, 1980 to August 20, 1988), shelling Kuwaiti oil fields using rocket-assisted rounds which made them immune from Iraqi counter-battery fire. During the war, Iraqi forces captured several of the M-1978 and emplaced them as war trophies. 

     The one in the image was located near the University of Anbar in Ramadi, Anbar, Iraq and is seen being towed away by U.S. Marines in 2008. The M-1978 remains in North Korean service and some sources say surviving Iranian M-1978s also remain in service with Iranian artillery forces.

The Holt 55–1: The Beginning of U.S. Self-Propelled Guns

 

The Holt 55–1 fitted with the Vickers BL 8in. Mk. VIII howitzer under test at Aberdeen Proving Grounds, Maryland in 1917. Retouched photograph by Underwood & Underwood.

     Even as far back as 1915, the U.S. Army Ordnance Department was investigating the mechanization of field artillery beyond simply using tractors to move artillery pieces about the battlefield. During World War One, the Holt Tractor Company was the largest producer of tractors and supplied not only the U.S. Army but also the armies of Britain and France with all three nations using the tractors to pull their respective heavy artillery pieces across the battlefield where horses and trucks could not tread. It would be the British that beat the U.S. to the punch with the development of the Gun Carrier Mk. I, the world’s first production self-propelled gun. Using components from the original British Mk. I tank, the fully tracked Gun Carrier Mk. I was designed to carry either the Ordnance BL 6in. howitzer or the Ordnance BL 60-pounder gun. The vehicle was meant to move the guns to firing positions where they would be dismounted and set up but if need be, the 6in. Gun (not the 60-pounder) could be fired while still on the Gun Carrier. Deliveries of the Gun Carrier Mk. I started in mid-1917 and in all, some 48 vehicles were delivered by the end of the war. As it was, in practice, the Gun Carrier Mk. I was used more as a supply vehicle and rarely as a self-propelled gun. Two major occasions where the Gun Carrier Mk. I functioned as a self-propelled gun was during the Battle of Pilckem Ridge (that ran from July 31, 1917 to August 2, 1917) and the Battle of Amiens (from August 8 through August 12, 1918) and in both cases, the crews fired the howitzers then shifted positions in order to avoid any German counter-battery fire. This is a tactic used even today by self-propelled artillery.

     Returning to the U.S., the Ordnance Department was looking to mount the new 3in. M1917 anti-aircraft gun on a tractor and the Holt Tractor Company stepped up to the plate and suggested a proposal by Pliny E. Holt for just such a mount. Authorization was received to commence development and construction of a prototype and sometime in 1917, the all caterpillar tracked Holt 55–1 was completed and submitted for testing. The Holt 55–1 was a relatively simple affair, consisting of a rectangular riveted metal chassis with the engine, fuel tank, and driver’s station in the rear and the M1917 gun fitted to a high-elevation pedestal mount in the center of the chassis. There was no armor or shielding to protect the power-train, crew or gun though the 55–1 did have outriggers that were deployed to stabilize the vehicle during firing. Testing showed that the 55–1 did have some problems but nevertheless, it demonstrated that the concept of a self-propelled artillery gun was worthwhile. The 55–1 was refitted to carry the heavy Vickers built BL 8in. Mk. VIII howitzer and that is what is shown in this picture distributed by the news photography division of Underwood & Underwood. The mount for the howitzer was made of thick oak planking and does not appear to have had any elevation capability. However, as it was simply a test mount, the Holt 55–1 performed adequately, being able to absorb the recoil of the howitzer without any difficulty. Like the previous gun mount, the revised Holt 55–1 had two extendable outriggers on each side though in this retouched photograph, they appear to be missing. Very few actual photographs exist of the 55–1 and those that do don’t show any camouflage paint applied. In addition to the two gun mounted variants, the 55–1 was also tested as a unarmed (and unarmored) transport, the driver’s station having been moved to the front of the vehicle. The Holt engine along with it’s radiator can be seen with the driver sitting in front of it. On the other side of the driver is the fuel tank for the engine. It appears that there is another man with steering levers on the front of the 55–1 but he is likely just holding on to the outrigger components as there was no room for a driver station in front with the gun mounting. Thus, the driver worked both the speed control as well as the steering levers for the vehicle. The driver actually had no seat and instead, he is sitting on the oak planking that went around the top of the vehicle. Likewise, the three standing men are also atop the oak planks, one of them holding on to a metal brace supporting the gun. It is unknown what the crank is for as an original photograph of the 55–1 doesn’t show such an apparatus so it may have been added to the photograph.

     The 55–1 weighed 11 tons, was 20.6 feet long, 10 feet wide, and 9.5 feet high. Power came from a single Holt 4-cylinder engine that developed 75 horsepower. The engine was tied into a Clark 5-speed transmission. This gave the 55–1 a maximum speed of 5mph. The 8in. Mk. VIII howitzer fired a 200 pound high-explosive shell at a muzzle velocity of 1,500 feet per second. This gave the gun an effective range of just shy of 7 miles. The normal elevation of the gun was 0 degrees to a maximum of 45 degrees and a traverse of 4 degrees to the left or right. The breech was of the Welin interrupted screw type with a Asbury Breech Mechanism that opened the breech by combining the unscrewing, withdrawing, and swinging clear movements of the breech into one continuous action. Likewise, the closing of the breech after the round and charge was loaded was also one action. This sped up the loading and unloading of heavy guns which allowed for a increase in the rate of fire. Recoil was absorbed by a hydro-pneumatic recuperator and hydraulic buffer.

     Only one Holt 55–1 was constructed and it was not put into production. Pliny Holt was lured away from the Holt Tractor Company and went to work for the Rock Island Arsenal, Rock Island, Illinois and while there, he oversaw the development of a series of self-propelled guns, the Mark I through the Mark X between 1918 and 1922. Fifty Mark I (with the 8in. Mk.VIII howitzer), fifty Mark II (with a 155mm M1918 gun), and a total of 250 Mark III and Mark IV (with a 240mm Schneider TR M1914 howitzer) self-propelled guns were contracted but the end of World War One saw the contract drastically cut back to only a handful of vehicles for experimentation use only. Despite none of Holt’s vehicles making it into production service with the U.S. Army, they did provide significant knowledge in design that would come into play when war once again loomed on the horizon.