GameSpot: The first question may seem rather obvious, but why choose the Sioux to be one of the three Native American civilizations in the expansion? The Sioux is the second Native American nation in the expansion. To get the very first details on the Sioux, we caught up with Sandy Petersen, lead designer of WarChiefs, which is scheduled to ship later this year. The WarChiefs will feature three Native American nations, and they'll offer a different perspective and play style compared to the European nations found in the core game. The Sioux will be the second Native American nation to be featured in Age of Empires III: The WarChiefs, the upcoming expansion to last year's best-selling real-time strategy game.