For 10 points, name this South American civilization whose ruler, Atahualpa, was overthrown in 1533 by Francisco Pizarro.
The southern expansion of this empire was halted by the resistance of the Mapuche at the Battle of the Maule. A system of runners known as chasquis was used to deliver messages between the cities in this empire, whose last ruler was Tupac Amaru. This civilization kept records using knotted strings known as quipus, and one ruler of this empire was captured at Cajamarca, held for ransom, and executed. For 10 points, name this South American civilization whose ruler, Atahualpa, was overthrown in 1533 by Francisco Pizarro.
The southern expansion of this empire was halted by the resistance of the Mapuche at the Battle of the Maule.
Incan Empire [accept Incas or Incans or Tawantinsuyu]