Born on June 12, 1920 in the Mörzheim district of Landau in der Pfalz in the Rhineland, Karl Buckel first entered service with the Reichsarbeitsdienst (RAD; Reich Labor Service) in 1939. He was assigned to the 4th. Kompanie, 84th. Bataillon (RAD.-Abteilung 4/84) from the VIII Brandenburg-Ost District and held the rank of Arbeitsmann. His unit was involved in the construction of fortifications along Germany's western borders, known as the Westwall (or the Siegfried Line to the Allies), and for this, he was awarded the Deutsches Schutzwall-Ehrenzeichen (West Wall Medal) on March 15, 1940. Sometime in 1941, Buckel was called up for military duty in the Heer (Army). His first posting was with 2.Bttr./Stu.Gesch.Abt.189 (2. Batterie, Sturmgeschütz-Abteilung 189), the unit having been formed on July 10, 1941 at the Jüterbog Truppenübungsplatz (Jüterbog Military Training Ground) in the south of Berlin. Following training, the unit deployed for the Eastern Front on August 5, 1941 where it was initially part of IX. Armeekorps, 9. Armee, Heeresgruppe Mitte but within five days, it was shifted to XXXX. Armeekorps (mot.), 9. Armee where it remained, seeing combat between August 10 through September 2, 1941. On November 19, 1941, Buckel's unit, 2.Bttr./Stu.Gesch.Abt.189, was ordered to detach and report to XXVII. Armeekorps, where it continued to see action. It was during this time that Buckel, now holding the rank of Unteroffizier (equivalent to Corporal in the U.S. Army), earned the Eisernes Kreuz 2. Klasse (Iron Cross, 2nd. Class) on December 16, 1941. Beginning on January 3, 1942, 2.Bttr./Stu.Gesch.Abt.189 was placed under 9. Armee (Reserve) along with the headquarters unit of Stu.Gesch.Abt.189 and both remained there until Januay 11, 1942 when the entire unit reformed at Olenino, Tver Oblast, Russia. Through January 22, 1942, the unit engaged in operations around the Olenino area but on February 18, 1942, 2.Bttr./Stu.Gesch.Abt.189 was again detached and subordinated to another unit, this time VI. Armeekorps. It was during this period that Buckel was awarded the Allgemeines Sturmabzeichen (General Assault Badge) on January 20, 1942. This decoration was usually awarded to non-infantry units that participated in or supported infantry or mechanized infantry assaults on three different occasions. 2.Bttr./Stu.Gesch.Abt.189 was transferred to the 6. Infanterie-Division, VI. Armeekorps on August 24, 1942 and the rest of the unit soon joined it on August 26, being deployed along the Rzhev Salient. From late August to October 19, 1942, Buckel saw further combat before the unit was shifted to XXVIII. Armeekorps, 9. Armee. It was during these engagements that Buckel earned the Eisernes Kreuz 1. Klasse (Iron Cross 1st. Class), being officially awarded on October 15, 1942. At some point in 1942, Buckel became a Fahnenjunker-Unteroffizier (Officer Candidate) though his rank remained Unteroffizier.
Given there is a bit of a gap in Buckel's decorations, it could be surmised that sometime in 1943 he attended officer candidate school (Kriegsschule; Military School) that encompassed eight weeks of intensive training. After his graduation, he then went to one of the Truppenschule (Branch of Service School) for continued training, this time as an assault gun (Sturmgeschütz) unit leader. Perhaps a validation of this was that on December 27, 1943, Buckel was awarded the Ehrenblattspange (Honor Roll Clasp) which was received for further distinguishing acts in combat. At the time of this award, he now held the rank of Leutnant (2nd. Lieutenant). Buckel was assigned to a new unit, Sturmgeschütz-Brigade 277, which had been formed on February 11, 1944. Specifically, Buckel was with the 1st. Battery (1.Bttr). Buckel's ability as a soldier and officer saw him quickly promoted to Oberleutnant der Reserve (1st. Lieutenant of Reserves). The unit was assigned to 6. Armee (Reserve), Heeresgruppe A and spent several months being refitted and crews trained. In June 1944, the unit was sent to the Cholm region of operations on the Eastern Front under 4. Panzerarmee, Heeresgruppe Nordukraine. On March 21, 1944, Buckel received further accolades by being decorated with the Nahkampfspange (Close Combat Bar or Clasp) in Bronze and the Allgemeines Sturmabzeichen III.Stufe (Grade III; meaning, he had engaged in at least 50 assaults with or in support of infantry). On July 2, 1944, he received the Deutsches Kreuz in Gold (German Cross) for repeated acts of bravery or outstanding achievements. Buckel was made the commander of the 3rd. Battery (3.Bttr) and on July 15, 1944, Buckel earned the Ritterkreuz des Eisernen Kreuzes (Knight's Cross of the Iron Cross) for actions in support of the 212. Infanterie-Division. The division was positioned near Lepel along with Buckel's unit when it came under attack by Soviet forces who broke through near the village of Durilowitschi, the main area of operations for the division. Buckel's 3rd. Battery deployed and succeeded in destroying several Soviet tanks that stalled the Soviet advance. After rallying German forces nearby, Buckel was able to initiate a counterattack which ousted the Soviets from Durilowitschi. Further actions saw Buckel earn the Allgemeines Sturmabzeichen IV.Stufe (for participating in at least 75 assaults total) on October 31, 1944. By this date, the unit was under the XXVI. Armeekorps and in December 1944, the unit was renamed Heeres-Sturmartillerie-Brigade 277. Buckel was also decorated with two Panzervernichtungsabzeichen (Tank Destruction Badge) though the exact dates of when they were earned and how is not known. He was also awarded the Medaille Winterschlacht im Osten 1941/42 (Winter Battle in the East 1941–42 Medal), better known as the Ostmedaille (Eastern Medal), for his service on the Eastern Front.
As for Heeres-Sturmartillerie-Brigade 277, it remained with Heeresgruppe Mitte until the end of the war when the general surrender of Heeresgruppe Mitte forces was issued on May 8, 1945. Buckel was taken prisoner by French forces but he would later escape from the POW encampment and was never recaptured. In time, Buckel returned to military service, this time with the West German Bundeswehr which was formed on November 12, 1955. He would retire from the Bundeswehr in 1976, having attained the rank of Oberstleutnant (Lieutenant-Colonel). Buckel passed away on September 2, 1997 at the age of 77.
The photograph of Buckel shows him with the majority of his awards and it also shows him with the rank of Oberleutnant der Reserve. The ciphers on his schulterstücke (shoulderboards) are difficult to identify but may be the unit number of 277. Given he is wearing the Ritterkreuz des Eisernen Kreuzes around his throat, the photograph can be dated on or sometime after July 15, 1944. The two tank destruction badges can be seen on his right sleeve, the Deutsches Kreuz is on the upper, right pocket, and through the buttonhole on his feldbluse is the ribbon for the Eisernes Kreuz 2. Klasse and beneath it, the ribbon for the Ostmedaille. Above the left pocket of his feldbluse is the Nahkampfspange and above that can be seen two stitched thread loops, often used to secure a ribbon bar which he is not wearing. Typically, this is where he would have worn the ribbon for the Deutsches Schutzwall-Ehrenzeichen. Beneath the Nahkampfspange is his Eisernes Kreuz 1. Klasse, Allgemeines Sturmabzeichen, and another unidentified medal. Not seen is the Ehrenblattspange which would normally have been pinned through the ribbon for the Eisernes Kreuz 2. Klasse. This was because the actual clasp was not produced until after January 30, 1944. Before that date, it was only a paper award and noted in the soldier's soldbuch. At the time the photograph was taken, Buckel may not have had the opportunity to obtain the clasp.