Ninan Cuyochi, who was Inca for only a few days in 1527, is sometimes left off the list of Sapa Incas because news of his death from smallpox arrived in Cusco very shortly after he was declared Sapa Inca. He had been with Huayna Cápac when he died. The death of Ninan, the presumed heir, led to the Inca Civil War between Huáscar and Atahualpa, a weakness that the Spanish exploited when they conquered the Inca Empire.