 Prince Yupanqui, who had previously been sent to a llama ranch, defeated the Chanka.After the war, the Sapa Inca assumed the name Pachacuti after the tough battle, and the city of Cusco ran the risk of being captured by the Apurímac people.According to some Incan traditions, the Urin Chankas had been conquered much earlier, around the year 1230, when the Sapan Incan Mayta Cápac and his army crossed the Apurímac River, formerly called Qhapaq Mayu ("main river"), by means of a huge hanging bridge.