Hospital and wounded troops: recovering after a battle

The Hospital creates a recovery layer after combat. When a battle produces wounded troops, hospital capacity and healing queues can return eligible units instead of forcing you to train every replacement from nothing. Recovery still takes resources and time, so an unprofitable attack does not become free. Upgrade the Hospital when repeated battles are part of your strategy, keep enough economy to fund healing, and compare the healing queue with fresh training before choosing how to rebuild.