Cost N/A Upgrades to Longbowmanor Crossbowman N/A Required technologies N/A Required resources N/A Other attributes N/A Archers are mainly used to defend cities early in the game. Their low combat strength makes it difficult to use it offensively, or against Horse Archers. The Archer is replaced by the following unique units: * Bowman (Babylonian) * Skirmisher (Malian)