Age of Empires III: The WarChiefs Preview - GameSpy previews the game with unbiased opinions and detailed analysis. - http://pc.gamespy.com/pc/age-of-empires-iii-expansion-pack/724116p1.html
Age of Empires III: The WarChiefs - First expansion pack for the real-time strategy game which will engage gamers in epic warfare in the Americas. - http://www.microsoft.com/games/pc/age3warchiefs.aspx