The expansion introduces three Native American civilizations, each with unique mechanics, units, and "WarChief" hero characters:
: Focuses on Chayton Black during the Sioux Wars of the late 19th century. Key New Features & Enhancements Age of Empires 3: The WarChiefs
: Follows Nathaniel Black as he fights alongside the Iroquois and Americans during the American Revolutionary War. each with unique mechanics
: A highly mobile, aggressive civilization focused on cavalry. They do not require houses to increase their population limit. Age of Empires 3: The WarChiefs
: An infantry-heavy civilization that features powerful warrior priests and the unique Fire Pit (now known as the Community Plaza) to generate powerful bonuses. Single-Player Campaign