The game not only covers the war in SVN but covers the fighting in Cambodia and Laos as well. Turns are bi-monthly, covering the years 1965 to 1975. Units are rated for strength only. For combat each player rolls one die and adds to it the average strength of his involved units. There are bonuses for having more involved units, air power, terrain, artillary and fire bases.
Communist units can operate either face down of face up.
Face down Communist units can also try to ambush enemy units that move adjacent. Victory is based on a political track. Face up communist units count more than face down ones for driving down the total on the political track. One twist to the politics is that pro West adjustments take place once per game turn, while pro Communist adjustments are done every player turn. The Western reinforcement schedule is fixed.