Gamespot had a Q&A session with Ensemble Studio's lead designer Sandy Petersen. Here's a small excerpt:

As the latest chapter in the best-selling real-time strategy series, Age of Empires III explored the age of colonialism when European powers settled the Americas, and then fought it out with one another. You take command of any of the major powers and attempt to conquer the New World the old-fashioned way by collecting resources, constructing buildings, and raising armies. Microsoft and Ensemble will explore this era further with Age of Empires III: The WarChiefs, the upcoming expansion pack that not only adds in new content for the existing European civilizations, but also lets you play as the Native Americans for the first time. For the latest details, we caught up with lead designer Sandy Petersen, and he filled us in on some interesting new features. Some might even call them "revolutionary." The WarChiefs is scheduled for release later this year.

Read the full article here.