The Carthaginians, Celts, Koreans, Ottomans, Vikings, and Zulu.
The expansion includes that offer gameplay different from the standard 4000 BC start, such as the Rise of Rome , Chinese Unification , and Genghis Khan . It also introduces three new wonders , including the Great Wall, which uniquely shows up on the world map. Civilization IV: Warlords Review - IGN
A new type of Great Person that emerges through combat experience rather than birth rate. They can be used to lead an army for a massive experience boost, build a Military Academy for faster unit production, or join a city as a Military Instructor.
A new diplomatic mechanic where players can subjugate other civilizations or offer themselves as a vassal. Vassals provide tribute and support their masters in war but may secede if they regain enough power.
Includes leaders for the new civs and additional leaders for existing ones, such as Stalin (Russia) and Churchill (England).