Before revision: Before that time, Inca only sporadically attacked its neighbors in the Cuzco Valley, but it was still a weak, tribute-based state.Patterson 1987, 118 The Inca conquer began in the 1420s by reconstructing Cuzco after driving out the warriors of a powerful rival dominion, the Chancas.
After revision: Before that time, Inca only sporadically attacked its neighbors in the Cuzco Valley, but it was still a weak, tribute-based state.Patterson 1987, 118 The Inca conquest began in the 1420s by reconstructing Cuzco after driving out the warriors of a powerful rival dominion, the Chancas.