View of soldiers in Ford GPA amphibious vehicles during maneuvers near Detroit. Label on back: "Release Sunday, March 21, 1943. New Ford-built amphibian simulates activity in actual combat with fully equipped soldiers on a fast flowing stream in the Detroit area. Called by the Army 'the most flexible new machine of the war,' it is in full production at the Ford Rouge plant. Steering of the craft is the same in the water as in land operation. From Ford News Bureau, John W. Thompson, Director. Administration Building. Dearborn, Michigan." Handwritten on back: "Amphibious vehicles."