As the first television drama series about the Vietnam War, Tour of Duty focuses on a single platoon of young U.S. soldiers through their one-year tour of combat duty in Vietnam during the late 1960's. While their own country is rocked by a massive anti-war movement, these young men find themselves thrown into combat in Southeast Asia, where they face enemy troops they can not see and sometimes can not kill. They also face their own fears, as they struggle in a hostile environment just to keep themselves and their fellow soldiers alive.