The Pueblos are a playable tribe in American Conquest. They are the only faction that does not need peasants to draft any kind of unit; the 'pueblo' building drafts all units, peasants, and improvements. Because of this, however, they have only a few buildings, leading to a smaller possible population cap. The reason behind this is that as you build more of the same type of building, it costs more and more.
Historically, the Pueblos rose up against the Spaniards in the late 17th century under Po'pay. Their units bear an uncanny resemblance to the Apache raiders and scouts of the 18th century, and in fact their shooter unit is used for the unplayable Apaches in Divided Nation.