Churchill's American Arsenal reveals how the technology, know-how, and production power behind the victorious Allied partnership during World War II extended beyond the battlefront and onto the home-front. Many weapons and inventions were credited with winning World War II, most famously in the assertion that the atomic bomb "ended the war, but radar won the war." What is less well known is that both airborne radar and the atomic bomb were invented in British laboratories, but built by Americans. The same holds true for many other American weapons credited with the Allied victory: the P-51 Mustang fighter, the Liberty ship, the proximity fuze, the Sherman tank, and even penicillin all began with British scientists and planners, but were designed and mass-produced by American engineers and factory workers. Churchill's American Arsenal chronicles this vital but often fraught relationship between British inventiveness and American technical might. At…