Haven´t played this yet. From BGG:
This game was the first in what has become a very popular trend for wargaming. The typically hex-based maps were simplified into an abstract system of connected spaces, which are used for army movement and to keep track of who controls the provinces politically. The armies themselves are greatly simplified, but the general in charge of the army gains much importance through his ratings for combat effectiveness and overall strategic effectiveness. Typically, dice are used to resolve conflicts between troops, however a deck of battle cards are used instead, which captures the feel of conflict much better and gives approximately the same results seemingly without the bitterness that accompanies skewed die rolls. And lastly, the overall ebb and flow of the game is determined through the play of strategy cards, which ostensibly mark certain historical events during the Revolutioary War, but each card has multiple purposes depending on which side is attempting to use it.