 Complete the following phrase:  Beginning with 19th-century historians Diego Barros Arana and José Toribio Medina, various scholars have pointed out that the incorporation of Central Chile to the Inca Empire was a gradual process. Nevertheless, it is generally accepted that incorporation into the empire was through warfare which caused a severe depopulation in the Transverse Valleys of Norte Chico, the Diaguita homeland. Chronicler Diego de Rosales tells of an anti-Inca rebellion in the Diaguita lands of Coquimbo and Copiapó concurrent with the 