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.

Terence Knox, Kevin Conroy, Stephen Caffrey, Joshua Maurer, Steve Akahoshi, Tony Becker, Eric Bruskotter, Stan Foster, Ramon Franco and Miguel A. Nunez, Jr. star as the infantrymen who represent diverse racial, cultural and philosophical backgrounds but must ultimately depend on one another to get through the war alive.