SD:OP M4A2 (155mm)

 is a French Artillery unit.

Overview
This tanks spots for a American 155 mm Gun M1. This Field Gun replaced the World War I French 155mm GPF. 155 mm Gun M1 was created by Westervelt Board which planned the US Army artillery post Great War. Prototypes were created during the 20s and 30s but financial issues prevented deployment.

25 Long Tom were lend lease to Free French.