The 37mm antitank gun M3A1 wasn't powerful enough to cope with German tanks, but it was useful in the Pacific, where large numbers were deployed. This picture shows four Marines with a 37mm gun in action on Okinawa. 


37mm gun in action

U.S. Marines inspect a Japanese gun emplacement on Guadalcanal, Solomon islands, located in the south-western Pacific, north-east of Australia; 1942. 


Checking out an enemy bunker

Captured Japanese soldier under Marine guard on the island of Guam; 1945. 
