In large part, industry won World War II. As the United States converted to a total war economy, it banned the sale of new cars and switched its efforts to building the tools to win the war. Not only was the United States industry able to equip its massive armies, but it was also able to partially equip its allies like Great Britain and the USSR. The United States helped turn wartime Allied warplane production decisively against the Axis powers and the US built and (lost) countless thousands of aircraft. Here are five of the top American aircraft manufacturers of WWII.