History of the Incas History of the Incas The Incas were most notable for establishing the Inca Empire in pre-Columbian America, which was centered in what is now Peru from 1438 to 1533 C.E. and represented the height of the Inca civilization. The Inca state was known as the Kingdom of Cusco before 1438. Over the course of the Inca Empire, the Inca used conquest and peaceful assimilation to incorporate in their empire a large portion of western South America, centered on the Andean mountain ranges. However, shortly after the Inca Civil War, the last Sapa Inca (emperor) of the Inca Empire was captured
Machu Picchu an Inca grass rope bridge, across the Urubamba River in the Pongo de Mainique, provided a secret entrance for the Inca army. Another Inca bridge was built to the west of Machu Picchu, the tree-trunk bridge, at a location where a gap occurs in the cliff that measures . The city sits in a saddle between the two mountains Machu Picchu and Huayna Picchu, with a commanding view down two valleys and a nearly impassable mountain at its back. It has a water supply from springs that cannot be blocked easily. The hillsides leading to it were terraced, to provide