A gun crew from the 864th Antiaircraft Battery mans a 40mm antiaircraft gun at Isley Field on Saipan, Mariana Islands in July 1944. Thunderbolts and Avengers are visible in the background. (U.S. Air Force Photograph.)
Tag - antiaircraft
Quad 40mm antiaircraft guns firing aboard the U.S. Navy aircraft carrier USS Hornet (CV-12) in February 1945. (U.S. Navy Photograph.)
Illustration of the M19 Twin 40-mm Gun Motor Carriage. (Source: U.S. War Department Technical Manual TM 9-1729A, 1944.)