Enlist now!
It is year 1961, and the Vietnam War is yet to begin for the U.S. military, though there is a U.S.Army Special Forces presence in the South under CIA command, training Vietnamese Special Forces and, with the Civilian Irregular Defence Group (CIDG), the aborigine minorities in the rural regions in guerilla warfare.
This is a story of an Special Forces A-team, fighting a war that wasn't considered a war for over a year later, working with local Montagnards.
The campaign uses Revised Deluxe Recon rules by Palladium Games. You don't have to be a scholar on Vietnam War nor have served in the military to enjoy the game, but be warned that the GM expects you to learn things during the play.