Huayna Capac
Topa Inca Yupanqui’s unexpected death in about 1493 precipitated a struggle for the succession. It appears that Topa Inca Yupanqui had originally favoured the succession of Huayna Capac (Wayna Qhapaq), the youngest son of his principal wife and sister. Shortly before his death, he changed his mind and named as his successor Capac Huari (Qhapaq Wari), the son of another wife. Capac Huari, however, never became emperor. The claims of his mother and her relatives were suppressed by the supporters of Huayna Capac. This group was led by Huaman Achachi (Waman ’Achachi), the child’s uncle and presumably the brother of the Emperor’s principal wife. A regent named Hualpaya (Walpaya) was appointed from this group to tutor Huayna Capac in the ways of government until the child was old enough to rule in his own name. Hualpaya, however, tried to assert the claims of his own son to the throne and, as a result, was killed by Huaman Achachi. Huayna Capac’s reign was mostly peaceful; he devoted much of his time to traveling, administering the empire, and suppressing small-scale revolts. He did extend the empire by conquering Chachapoyas, a mountainous country in northeastern Peru, and later northern Ecuador. After conquering Chachapoyas, he recruited part of his bodyguard from the warlike inhabitants of the area. The conquest of northern Ecuador occupied the last years of his life and took place shortly before the Spaniards arrived. During these campaigns, he pushed the frontiers of the Inca empire to the Ancasmayo River, the present-day boundary between Ecuador and Colombia.
While he was fighting in northern Ecuador, Huayna Capac received word that the Bolivian frontier had been invaded by a Guaraní-speaking group that periodically crossed the Gran Chaco from Argentina to raid Inca frontier settlements for bronze tools and ornaments made of precious metals. They were more of a nuisance than an actual threat to the empire, but Huayna Capac dispatched a general named Yasca (Yaska) to drive them from the area and to build forts along the frontier.
Meanwhile, he undertook another expedition in northern Ecuador to wipe out isolated pockets of resistance. During this campaign, he learned that an epidemic was sweeping Cuzco and the surrounding countryside. He left immediately for Quito, on the highroad to Cuzco, to deal with this crisis and arrived there about the same time the epidemic did. The pestilence had spread rapidly from Bolivia and, judging by its description, was either smallpox or measles, both of which were European diseases introduced into South America by the Spanish settlers at La Plata. The disease was probably communicated to the Andean area by the Guaraní, who had been in contact with the Spanish at La Plata. Whatever the ailment was, Huayna Capac contracted it and died about 1525, without naming a successor in the appropriate manner. This set off another struggle over the throne.