One of the longest and most controversial wars in American history, the Vietnam conflict, was a time of great advances in military technology. Readers explore the world of military machines and the science behind the United States' battles in Vietnam. Full-color photographs will show readers the airplanes, artillery, and chemical weapons 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.