An alternative type of combat is "attrition". The attacker totals the land factors in contact with the enemy (air units play no part). The die roll may require the enemy to lose counters (major countries have replacement units - immobile single-factor infantry units - used to garrison remote areas or to remove to fill attrition losses, apart from the USSR which has many cheap single-factor infantry armies) or hexes - the attacker may not choose a capital, red objective city or bridgehead. The defender may eliminate units from a hex to prevent it being chosen for attrition occupation. There are three fronts (East, West and Mediterranean) on the map; in a multi-player game, attrition may only be selected if all players of one side choose that option for that front - if one player wants to take an offensive, his allies must do the same or else pass (neither movement into enemy-controlled hexes nor combat allowed).