Siege warfare is a military strategy used to capture fortified places, such as castles or cities, by surrounding them and cutting off supplies. This method often involves building siege works, like trenches and towers, to protect attackers while they attempt to breach walls or starve defenders into submission. During a siege, armies may employ various tactics, including catapults and battering rams, to damage fortifications. The defenders typically try to hold out until help arrives or until they can negotiate terms. Successful sieges can lead to significant territorial gains and shifts in power.