For 10 points, identify this empire in South America with capital at Cusco.
It was formed by the union of Chincasuyu, Antisuyu, Kuntisuyu, and Qullasuyu to form the  Tahuantinsuyu, or The Four United Provinces, under the rule of Pachacuti. A later leader,  Huayna Capac, divided this empire after his death among his two successors, one of whom was  captured and executed by Pizarro despite paying a room full of gold as ransom. That last leader  was Atahualpa. For 10 points, identify this empire in South America with capital at Cusco.
It was formed by the union of Chincasuyu, Antisuyu, Kuntisuyu, and Qullasuyu to form the  Tahuantinsuyu, or The Four United Provinces, under the rule of Pachacuti.
Inca Empire [accept Tahuantinsuyu before mentioned]