An army that has suffered casualties or attrition requires fresh recruits to replenish troop numbers. If it is on friendly territory unit replenishment will occur automatically. The closer it is to a region with fresh recruits in it, the faster the rate of replenishment will be. If no replenishment occurs it may be because the army is in an enemy province or an area of attrition. The rate of replenishment can be improved by the character's acquisition of certain household members or objects.