The Kingdom of Cusco - The Inca people began as a tribe in the Cusco area around the 12th century. Under the leadership of Manco Capac, they formed the small city-state of Cusco. In 1438, they began a far-reaching expansion under the command of Sapa Inca (paramount leader) Pachacuti-Cusi Yupanqui, whose name literally meant "earth-shaker". The name of Pachacutec was given to him after conquering over the Tribe of Chancas (modern Apurimac). During his reign, he and his son Tupac Yupanqui brought much of the Andes mountains (roughly modern Peru and Ecuador) under Inca control.

The Inca Empire Re-Organizational Formations

Pachacuti reorganized the kingdom of Cusco into an empire, the Tahuantinsuyu, a federalist system which consisted of a central government with the Inca at its head and four provincial governments with strong leaders: Chinchasuyu (NW), Antisuyu (NE), Contisuyu (SW), and Collasuyu (SE). Pachacuti is also thought to have built Machu Picchu, either as a family home or as a summer retreat, although there is speculation that Machu Picchu was constructed as an agricultural station.

Pachacuti sent spies to regions he wanted in his empire; they brought reports on the political organization, military might and wealth. He would then send messages to the leaders of these lands extolling the benefits of joining his empire, offering them presents of luxury goods such as high quality textiles, and promising that they would be materially richer as subject rulers of the Inca. Most accepted the rule of the Inca as a fait accompli and acquiesced peacefully. The ruler's children would then be brought to Cusco to be taught about Inca administration systems, then return to rule their native lands. This allowed the Inca to indoctrinate the former ruler's children into the Inca nobility, and, with luck, marry their daughters into families at various corners of the empire.