The Major City of Mortain gives 6 shifts to the defender. German HQ units give a column shift for offense and defense. German Tiger tank battalions give a column shift on attack. Allied attacks are restricted by supply. German movement abilities is tied to the weather.
Bad weather means fewer planes and more movement.
Victory for the Allies is determined by destruction of the German army and the sending of three Divisions to the Brittany Peninsula by turn seven. To win as the Germans you must hold the American break-out till turn after seven then run like hell with all your mobile divisions. You get Victory Points for all units but all you need is your mobile forces. The TSR Expanded Edition includes a second map starting the game on the 6th of June and includes another 200 counters. 32 counters didn't need printing at all.