America built almost 48,000 aircraft and 25,000 tanks in 1942, against Germany’s 15,400 planes and 9,200 tanks. In 1939, just 29 shipyards were building for the U.S. Navy; by 1942 there were 322, which would deliver over 100,000 new ships and small craft to the U.S. Navy and Maritime Commission before VJ-Day came.