The Union centers could be everywhere on or out of the map. The survivors can enter the game two turns later from a city in a range of no more than 30 hexes from the conquered center. A force made up only by cavalry SF may escape from a battle, simply rolling a die on the Cavalry retreat Table. All the combat units on the map must be supplied to operate normally. Any unit out of supply must roll on the Attrition Table.
Supply is taken by depots and through rail-lines leading to cities.
A supply line is blocked by enemy combat units or their ZOCs. Friendly units negate enemy ZOCs for this purpose only. A city is under siege when surrounded by enemy units or their ZOC, and therefore it's unable to receive supply. In this case, the besieger may roll every turn on the Attrition Table to inflict losses to the besieged, and every other turn to the Siege Table to receive a surrender. Revised values for leaders in play Several of the values indicated by the original designers of this game are debatable at best.