 In the 15th century, the Purépecha state was at war with the Aztecs.Many Nahua peoples who had lived side by side with Purépecha-speakers were relocated outside of the Tarascan frontiers, and Otomi-speakers fleeing the Aztec expansion resettled on the border between the two polities.That created a fairly homogeneous area of Purépecha speakers, with no other languages spoken in the core area around Lake Pátzcuaro.