It was the war to end all wars, one of the largest and deadliest conflicts in human history. Readers will find out how America used its brave men and military technology to come out on top in World War I. Readers will explore the world of military machines and the science behind the United States' victories against the Germans. Full-color photographs will show readers the artillery, tanks, and guns that powered the American attack. Firsthand accounts from soldiers who developed and operated these weapons will help readers understand how the development and application of technology can mean the difference between winning and losing the biggest battles in history.