What led to the establishment of the Inca in the Cusco valley?

The Inca established their empire in the Cusco valley through military conquest, strategic alliances with neighboring tribes, and implementing an efficient system of governance. Their leader, Pachacuti, played a significant role in expanding the Inca territory and centralizing power in Cusco. Additionally, the Inca's advanced agricultural practices and infrastructure projects helped them maintain control over the region.