British service Early in
World War II Britain lost many of its field guns in France, and the US transferred 395 M1917s to Britain,
Greek service The gun entered in Greek service during the Greco-Italian war of 1940–1941. Greece requested aid from the US and Britain, which in part came in the form of the British 75 mm field gun. A total of 24 by the US in March and 50 by Britain in January 1941 were offered. Of those, 24 were sent from Britain, but only 18 arrived in January 1941 to Greece. The rest of the offered guns were either sunk or never loaded on ships due to the fall of Greece in April 1941. The 18 that arrived to Greece were in need of maintenance before being pressed into service. Ultimately 4 guns saw service with the 19th Field Artillery Battalion, and 12 guns with the B3 Field Artillery Battalion.
United States and Philippine service 174 M1917s were sent to the US and Philippine Army and participated in the
Philippines Campaign where all were lost. Another 48 were still at sea and diverted to Java and served in the
Java Campaign where they were lost. ==Surviving examples==