Garcilaso de la Vega El Inca's "Royal Commentaries of the Incas Volume I" details Inca History all the way back from the 16th century to the year 1100 AD. This is more than just a little pre 16th century history, especially when we note that it contains a full record of Inca customs, science, and technology over that period of time. This is over 400 years of detailed pre 16th century Peruvian history.

The article on Peru says the Incas were a warlike tribe living in a semiarid region of Peru before moving into the Cuzco area in 1100 AD.

The Aymara Natives may have been a warlike tribe living in that semiarid region before moving into the Cuzco Valley, but the Incas and the Aymara were not the same people. We refer to the empire as Inca not Aymara, because they were two different peoples, and the Incas were the undisputed rulers. Garcilaso de la Vega specifically states that just as the Spanish are not Indians, his mother and her people were not Indians, even though his mother and her people were also not Spanish. He really spelled it out that the Incas were a separate race from both the Native Americans and the Spanish. Everywhere he refers to the Aymara, he refers to them as "Indians."