. Cultures of the West Chamber.
National Museum of Anthropology (Mexico) In the late classic, at least two non-Purépecha ethnic groups lived around Lake Pátzcuaro:
Nahuatl speakers in Jarácuaro, and some
Chichimecan cultures on the northern banks, with the
Nahua population being the second largest. According to the
Relación de Michoacán a visionary leader of the Purépecha named
Tariácuri decided to gather the communities around Lake Pátzcuaro into one strong state. Around 1300 he undertook the first conquests and installed his sons Hiripan and Tangáxuan as lords of
Ihuatzio and
Tzintzuntzan respectively, himself ruling from Pátzcuari city. By the death of Taríacuri (around 1350), his lineage was in control of all the major centers around Lake Pátzcuaro. His son Hiripan continued the expansion into the area surrounding
Lake Cuitzeo.
Hiripan and later his brother
Tangáxuan I began to institutionalize the tributary system and consolidate the political unity of the kingdom. They created an administrative bureaucracy and divided responsibilities of and tributes from the conquered territories between lords and nobles. In the following years, first the sierra and then the
Balsas River was incorporated into the increasingly centralized state. Under the rule of King
Tzitzipandáquare a number of regions were conquered, only to be lost again by rebellions or strategic retreats when confronted with Aztec expansion. In 1460 the Iréchikwa reached the Pacific coast at Zacatula, advanced into the
Toluca Valley, and also, on the northern rim, reached into the present day state of
Guanajuato. In the 1470s, Aztecs under
Axayacatl captured a series of frontier towns and closed in on the Purépecha heartland, but were eventually defeated. This experience prompted the Purépecha ruler to further fortify the Aztec frontier with military centers along the border, such as at
Cutzamala. He also allowed
Otomies and
Matlatzincas who had been driven out of their homelands by the Aztecs to settle in the border area under the condition that they took part in the defense of the Purépecha lands. From 1480 the Aztec ruler
Ahuitzotl intensified the conflict with the Iréchikwa. He supported attacks on Purépecha lands by other ethnic groups allied with or subjugated to the Aztecs such as Matlatzincas, Chontales, and
Cuitlatecs. The Purépecha, led by King Zuangua, repelled the attacks but further Purépecha expansion was halted until the arrival of the Spaniards two years into the rule of the last king of a sovereign kingdom,
Tangáxuan II. Between 1480 and 1510, the Iréchikwa occupied parts of present day
Colima and
Jalisco in order to secure
Nitratine (Chile saltpeter) mines in the region. Throughout the occupation, the peoples of
Colima,
Sayula,
Zapotlán,
Tapalpa, and
Autlán resisted Purépecha rule in the
Saltpeter War. By the end of the 30 year long occupation, the Iréchikwa was forced out of the area permanently. ==Religion==