The gun was also manufactured in the United States from 1917, after the US switched to metric artillery based on French patterns. It was used by the United States Army and United States Marine Corps as their primary heavy gun as the 155 mm Gun M1917 (French-made) or M1918 (US-made) until 1942, when it was gradually replaced by the 155 mm M1A1 Long Tom. US Army forces in the Far East (USAFFE), including the 301st FA Regiment (Philippine Army), the 86th FA Regiment (Philippine Scouts) and also US Coast Artillery units (91st and 92nd CA Regiments, Philippine Scouts), used this gun against the Japanese in the Philippines campaign (1941–1942). Some of the guns were originally emplaced in "Panama mounts" on Corregidor, Caballo and Carabao islands at the entrance of Manila Bay. Some guns were dismounted and used as roving batteries and gave effective counter-battery fire. The gun was later mounted on the M12 Gun Motor Carriage and saw action in 1944–45.