The Revised Recon

From the book introduction:

Welcome to the first and only role-playing game of modern warfare. The RECON game system is designed to simulate the kind of counterinsurgency warface found in the Vietnam War. RECON is designed for three to ten players with one of the players serving as the Mission Director or Game Master. Each player creates and 'plays' a make-believe player character (PC) and tries to survive in a world designed and controlled by the Mission Director (MD).

This is a war game where the good guys are the US troops and their allies. All the game players are good guys. The bad guys are Viet Cong (VC) and North Vietnamese Army Troopers (NVA). The Mission Director 'plays' the bad guys.