Breakthrough in the Ardennes

From the manual:

BREAKTHROUGH IN THE ARDENNES is a regimental level simulation of Germany's last effort on the western front.

BREAKTHROUGH IN THE ARDENNES is a two-sided game. German vs American. The German forces must be commanded by the human player. The American forces may be commanded by either a human or the computer.

Each game turn represents a full day of operations. The game begins December 16, 1944 and ends December 27, 1944 for a total of twelve turns. Units in the game range from battalions to divisions.
The map includes parts of France, Belgium, Luxembourg and Germany super-imposed on a 32 by 31 hexagon grid.

By Dave Landrey and Chuck Kroegel