Thupa Inca Yupanqui (also known as Topa Inca), Pachacuti's successor from 1471 CE, is credited with having expanded the empire by a massive 4,000 km (2,500 miles). The Incas .... The Inca had great reverence for two earlier civilizations who had occupied much the same territory - the Wari and Tiwanaku. read more