The artillery can fire over the river without penalty, and some of the infantry can cross the river without help. The combat system is simple and unusual. A unit's attack factor is the number it must equal or go below with a d6 to get a hit. A unit's defense factor is the d6 saving throw required to avoid a hit. Terrain and special rules alter the die roll.
Sixes always hit and ones always fail to save.
Infantry in a town can be very difficult to dig out. The Germans get some air support, but it is random, since this was not considered to be the main thrust. The Rommel counter adds bonuses to the units it is stacked with. Only the Germans get a special combined arms bonus if they put infantry and tanks together in the same stack. There is a possibility the Luftwaffe will hit German positions.