Formation of the Tarascan Empire

Timeline

1. 1351–1354Lake Pátzcuaro basin · MichoacánAfter the unifier Tariacuri died, his sons divided the realm according to clan tradition: the elder brother held religion and Pátzcuaro, the younger held the military and Tzintzuntzan, forming a dual-leadership framework of imperial governance.
2. 1354–1357Michoacán highlands · MichoacánImperial rulers combined military campaigns with marriage alliances, bringing the peoples around Lake Pátzcuaro and the western coast into the tribute network, collecting copper ware, dried fish, cotton cloth, and grain, and establishing central control over localities.
3. 1357–1360Tzintzuntzan · MichoacánBy around 1360, Tzintzuntzan, as the military capital, expanded its pyramids and yácata tomb complexes; the empire equipped its armies with copper weapons and atlatls, forming a western bulwark against Aztec expansion from the east.