Yet deferring to European standards only made sense if Europe was the heart of the Allied war economy, and Europe soon lost its centrality. The fall of France and bombing of Britain took European factories off-line. At the same time, U.S. manufacturing kicked into high gear. By the war’s end, the United States had produced 84,000 tanks, 2.2 million trucks, 6.2 million rifles, and 41 billion rounds of small ammunition. The war against Hitler may have been a European fight, but it was very much made in the U.S.A.