When Pizarro arrived once again in Peru in 1532, he found it vastly different from when he had been there just 5 years before. This time, Pizarro was surprised to see that the Tumbes region that he had visited before had become ruins. To piece together the situation before him, he asked for information from 2 young local boys whom he had recruited as interpreter before.
Pizarro eventually learned that there was an ongoing civil war that was happening in the Inca Empire. He found out that there was a feud between two Inca successors, Atahualpa and Huascar, born from different mothers. Initially, nobles appointed Huascar as Sapa Inca (or emperor) and considered Atahualpa illegitimate since his mother was born outside the royal family.
Soon after Huascar claimed the throne, to announce his loyalty, Atahualpa sent his most trusted captains to Cuzco, along with generous gifts of gold & silver. Suspicious, Huascar refused Atahualpa's offering. Accusing his brother of rebellion, he ordered some of his messengers killed, and sent back his captains dressed as women. ⠀⠀⠀⠀⠀⠀⠀⠀⠀
Immediately, Atahualpa declared war against his brother. He then planned to kill Huascar by sending troops to Cusco to capture him, but failed. After getting stunned by Atahualpa, especially when his brother created a new capital in the north, Huascar proclaimed him a traitor, and soon, a war broke out.
(Portrait: "Atahualpa, Sapa Inca of Inca Empire / 18th-century")