Colla–Inca War

Colla–Inca War
	Part of the Incan conquest of the Collao
	; The imperial army marching during the conquests of the Inca empire
Date	1445–1450
Location	Altiplano
Result	Incan victory; End of the Colla Kingdom; Quechuanization of the Colla Kingdom; Inca dominion is established in the Andean Plateau;
Belligerents
Inca Empire Incan Army;	Colla Kingdom Colla Army; Aymara Army;
Commanders and leaders
Pachacútec	Chuchi Capac (POW)
Strength
est. 12,000 troops	est. 300,000 troops
Casualties and losses
est. 500 killed	est. 700,000 killed

The Colla–Inca War or Incan conquest of the Colla Kingdom was a military conflict fought between the Inca Empire and the Colla Kingdom between 1445 and 1450. It is one of the first wars of conquest led by Pachacuti.

The Colla chiefdom was a powerful polity in the altiplano area, covering a large territory. However, multiple chiefs, possibly semi-autonomous, most likely ruled over the territory.

The war took place following the conquest of Sora and Chanka territories, in the context of longer lasting conflicts between Incas and Collas, which started with the reign of Viracocha Inca.

It established Inca dominance in the Andean Altiplano, and made the Inca an important entity in the Peruvian and Bolivian Andes. Inca dominance was contested during the beginning of Inca rule however, several revolts having threatened Inca power.