Túpac Inca Yupanqui

The widest territorial expansion in the history of Tawantinsuyu, the Inca empire, is credited to Tupac Inca Yupanqui, who ruled from about 1471 to 1493. A son of Pachacuti, the ruler regarded as the empire's true organizer, he commanded armies while still heir apparent, and the chronicles describe his northern campaigns of that period as decisive: the conquest of the highlands toward Quito and the defeat of Chimor, the wealthy coastal kingdom centered at Chan Chan, brought the Peruvian north under Cuzco's rule before he formally succeeded his father. All dates for his life and reign, including the conventional span of about 1441 to 1493, derive from chronicle-based reconstructions made decades after the conquest and are approximate at best.

As Sapa Inca he turned the armies south and east. Campaigns extended Inca control through the Bolivian altiplano and into northwest Argentina, and the southern frontier was pushed deep into Chile, traditionally as far as the Maule River, the most distant limit the empire reached in that direction. Expeditions against the forest peoples east of the Andes proved harder to sustain, and one chronicle preserves a story of a Pacific voyage to distant islands, an episode modern scholars treat as legend or as garbled report rather than established fact.

Conquest was matched by organization. The reign is associated with the elaboration of the decimal administrative hierarchy, the extension of roads and storehouses, the resettlement policy that moved whole communities as mitmaq colonists, and construction at Cuzco, including work on the fortress-temple of Sacsayhuaman begun under his father.

His marriage and descent arrangements followed the dynastic pattern attributed to the founders Manco Capac and Mama Ocllo: his principal wife was his sister, also named Mama Ocllo, and their son Huayna Capac succeeded him. His other descendants formed Capac Ayllu, his panaca, the corporation that maintained his mummy and estates after death — a body later persecuted during the civil war between his grandsons Huascar and Atahualpa, when forces of the latter desecrated his remains. Tupac Inca died around 1493; the chronicles report a contested succession in which partisans of another son, Capac Huari, were overcome and the young Huayna Capac was secured on the throne by powerful kinsmen.