Sid Meier's Civilization IV: Warlords

Warlords is the first expansion for Sid Meier's Civilization IV. It includes:

• A new unit for all civs, the warlord (a military leader) who provides new abilities to units.
• A unique building for each civ, as they have a special unit in the original game.
• 6 new civilizations
• 10 new leaders
• A new diplomatic option, the vassal state
• 2 new traits for leaders
• 3 new wonders, including the Chinese Great Wall you can view from space.
• 6 historical game scenarios