The resupply function allows the player to supply their units. This restores health as well as ammunition and fuel. Depending on the type of unit, resupplying a unit will restore a certain amount of health as well as other attributes. Resupplying a unit instantly from any location at any time will cost 150 gold. Replenishing a Supply Depot costs 90 gold while replenishing a supply truck costs 100 gold. It is considerably wiser for the player to take a supply truck with their troops and establish an effective supply line which will allow the player to constantly resupply their significant units for free.