The Legion is a ground unit in Civilization Revolution. The Legion is the most cost-efficient unit throughout the entire Ancient Era. It can be upgraded from its humble predecessor, the Warrior. Though very similar to the Warrior, the Legion is more powerful and effective in battle and can stand up to several waves of Ancient Era attackers when formed into an army. It's only when all of the civilizations enter the Medieval Era that the Legion will start to become less dominant in battles. As time goes on, other units such as Catapults and Knights may start winning battles against the Legion. This is when a change in tactics is needed.