 Delivery of the howitzers to Russia and France was delayed by the general mobilisation of 1914 which disrupted industrial production.During the war 126 howitzers were delivered to the French Army and 26 to Russia as the 280 mm Schneider Mortar Model 1914/15 () before the 1917 revolutions.In addition another 25 barrels were installed post-WW1 on the Saint-Chamond heavy self-propelled gun chassis as the Mortier 280 mm TR de Schneider sur affût-chenilles St Chamond.