Stacking is 3 units per hex and combat out of a hex is restricted. Large units (mainly German divisions and Soviet corps) have Combat Ratings which pull a strength chit for combat. Typically only one unit with a strength chit may combat out of a hex along with all smaller units. Movement and Combat phases with Mobile Assaults for mechanized units during certain situations of movement. CRT for combats keys off the defender's terrain and uses column shifts for extras like air support, combined arms, fortifications, etc. Combat results have some mandatory step losses, but the rest a player's choice on taking step loss or retreating. Advances after combat are along the Path of Retreat for non-mech units, but mech or cav units may deviate. Support Points are used to allow German supply to reach units for mechanized movement and attacks during turn. Support (for Axis attacks) is traced simply a number of hexes to a HQ and then a number of hexes to a road which leads to the source. Supply is just a general trace to a source.