Availible in the Stronghold Crusader Series.
Slaves are recruited from the Mercenary Post for only 5 gold each. They are the weakest and cheapest units in the game. They are run around shirtless carring only torches, lighting your enemy's buildings on fire. Usually they also light themselves on fire at the same time. Slaves are fast moving, and are the only arab unit that can dig/fill moats. Slaves are only good in combat if there are massive numbers concentrated in a small spot, but ranged units of any kind will kill them instantly.