Inca Conquest of the Chimú Empire in 1470

Timeline

1. 1468–1469Moche Valley · North CoastInca forces advanced from the eastern Andean slopes to the coast, breaking through the irrigation-based defensive system the Chimú had established in the Moche Valley, cutting off Chimú control over valley agriculture and water channels, and creating favorable conditions for the siege of Chan Chan.
2. 1469–1470Chan Chan · North CoastThe Inca besieged Chan Chan for a long period while the Chimú resisted from adobe fortresses and irrigation networks; around 1470 the city's defenses collapsed, Minchancaman was captured, Chimú political independence ended, and its artisans and metallurgical techniques were absorbed into the empire.
3. 1470Chimú Suyu (North Coast quarter) · Chimú SuyuAfter the conquest, the Chimú region was incorporated into the empire's North Coast administrative system; some local curacas were retained to manage irrigation agriculture and gold and silver production, while Chimú artisans were conscripted to Cuzco to serve the royal house, achieving political unification of the North Coast with the highland empire.