Pachacuti
Conquest of Qullasuyu

The Colla chiefdom and the Lupaca chiefdom of lake Titicaca, in the Altiplano (called "Collao"), were one of the first of Pachacuti's targets. Following the construction of the Qurikancha, the "temple of gold" dedicated to the sun, Pachacuti sent an army near the border with the Colla chiefdom, before joining his forces not long after. The Colla king or Colla Capac, informed of this, gathered his forces and awaited the Inca at the town of Ayaviri. During the ensuing battle, the Incas forced the Colla army to retreat, capturing the king, Colla Capac. Following the victory, Pachacuti occupied the principal city, Hatunqulla, and from there he received the submission of the Lupacas, the Pacasas and the Azangaros (previously a tributary chiefdom of the Collas). John Howland Rowe estimated the Inca Empire under Pachacuti to have reached the Desaguadero River near lake Titicaca, which marked the border between the conquered Lupaca chiefdom and the Pacasa chiefdom. However, in 1992, the Finnish ethno-historian Martti Pärssinen, pointing to local sources of the area of the Aymara kingdoms, supported the narrative of territorial expansion by Pachacuti's generals until the nation of Charcas, near lake Poopó. Various chroniclers place the birth of Topa Inca Yupanqui, son of the queen Mama Anarwakhi, during these conquests.

Pachacuti also potentially conquered parts of Kuntisuyu, where many Aymara enclaves were attached to the highland kingdoms, including the regions of Arequipa, Camana and Tarapacá. The conquest of these regions is also attributed to Amaru Topa Inca, during the subsequent revolt of the chiefdoms around lake Titicaca.
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