Describe how geography divided the territory controlled by the inca empire

Incan empire was the largest empire sometime in 13th century. It covers almost 2,000,000 square km of land. At northwest of Peru, more 600 km is where Ecuador lies. Ecuador is accessed through crossing the Andes Mountain and Amazon jungle. At the North East, they conquered parts of Brazil by traversing the same mountain and jungle. And more than 400 km northeast of Peru, they travel through the coastal desert and Andes mountain and conquered Chile.