 Complete the following phrase:  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, and represented the height of the Inca civilization. The Inca state was known as the Kingdom of Cuzco before 1438. Over the course of the Inca Empire, the Inca used conquest and peaceful assimilation to incorporate the territory of modern-day Peru, followed by a large portion of western South America, into their empire, centered on the Andean mountain range. However, shortly after the 