75 mm gun M1917
The 75 mm gun model of 1917 was an interim measure, based on the British QF 18-pounder, produced by the United States in World War I after it had decided to switch from 3-inch (76 mm) to 75 mm calibre for its field guns. == History == The US decided early in World War I to switch from 3-inch (76 mm) to 75 mm calibre for its field guns.