Tanks caused havoc among the Germans when they first appeared on European battlefields in 1917, breaking up the trench warfare stalemate and hastening the armistice. Because of production delays and political maneuvering, no American tanks made it into the war, and Americans had to use French machines instead. But as Dale Wilson recounts, a new breed of army officers—including Eisenhower and Patton—saw the promise of this new technology and staked their careers on it. While going behind the scenes for this pivotal moment, Wilson also chronicles how Allied tanks turned the tide at Saint-Mihiel, Meuse-Argonne, and St. Quentin.