Ordnance BL 15in. Howitzer Mk.I: A Gun The British Military Didn't Want

     In October 1914, the Royal Marines were reorganized in order to create two Royal Marine Artillery brigades. One served as an anti-aircraft artillery brigade while the other became the Royal Marine Howitzer Brigade (RMHB) under the command of Lieutenant-Colonel G. R. Poole. With a strength of around 1,000 men, the RMHB was split into twelve, one gun batteries. Each battery was composed of 60 men. A training facility was arranged for at Fort Cumberland, located in Portsmouth, UK. The guns deployed by the RMHB was the Ordnance Breech Loading (BL) 15in. Howitzer Mk.I and the RMHB would be the only unit to use them. 

     Coventry Ordnance Works, buoyed by their success with the 9.2in. howitzer, designed the BL 15in. gun on their own. However, with no military request for the gun, Coventry Ordnance Works used its influence within the British Admiralty to attempt to get interest in the product. At that time, Winston Churchill was First Lord of the Admiralty and saw the opportunity to get the Royal Navy involved in the land conflict in France. He authorized the purchase of 12 of the guns and so equipped, the RMHB would be sent to the Western Front in February 1915. The BL 15in. howitzer weighed around 94 tons and required three Foster-Daimler 105hp tractors to move. It could throw a 1,450lb shell out to a maximum range of 6.1 miles. Although effective enough when it came to eliciting destruction on German forces, the range was less than other, more capable guns and the time it took to bring the gun into action and the support required to operate it were detriments to its continued use. 

     Churchill’s support for the RMHB faded away in light of the performance of the howitzers and in time, the guns were forced onto the British Army who did not want them. Still, under Army oversight, RMHB crews served the weapons during the Battle of the Somme (September 1916) and the Third Battle of Ypres (October 1917). The guns were declared obsolete shortly after World War One and all of them were scrapped by 1920.