Expansion and consolidation
Traditionally the son of the Inca ruler led the army. Pachacuti's son Túpac Inca Yupanqui began conquests to the north in 1463 and continued them as Inca ruler after Pachacuti's death in 1471. Túpac Inca's most important conquest was the Kingdom of Chimor, the Inca's only serious rival for the Peruvian coast. Túpac Inca's empire stretched north into modern-day Ecuador and Colombia.
Túpac Inca's son Huayna Cápac added a small portion of land to the north in modern-day Ecuador and in parts of Peru. At its height, the Inca Empire included Peru and Bolivia, most of what is now Ecuador and a large portion of what is today Chile, north of the Maule River. The advance south halted after the Battle of the Maule where they met determined resistance from the Mapuche. The empire's push into the Amazon Basin near the Chinchipe River was stopped by the Shuar in 1527.[12] The empire extended into corners of Argentina and Colombia. However, most of the southern portion of the Inca empire, the portion denominated as Qullasuyu, was located in the Altiplano.
The Inca Empire was an amalgamation of languages, cultures and peoples. The components of the empire were not all uniformly loyal, nor were the local cultures all fully integrated. The Inca empire as a whole had an economy based on exchange and taxation of luxury goods and labour. The following quote describes a method of taxation:
For as is well known to all, not a single village of the highlands or the plains failed to pay the tribute levied on it by those who were in charge of these matters. There were even provinces where, when the natives alleged that they were unable to pay their tribute, the Inca ordered that each inhabitant should be obliged to turn in every four months a large quill full of live lice, which was the Inca's way of teaching and accustoming them to pay tribute.[13]