What ruler expanded Inca control in to an empire?

The ruler who expanded Inca control into a vast empire was Pachacuti. He reigned in the 15th century and is credited with transforming the Inca state from a small kingdom into a powerful empire through military conquests and strategic alliances. Under his leadership, the Inca expanded their territory significantly, incorporating diverse regions and cultures into their realm. Pachacuti also implemented administrative reforms that helped maintain control over the newly acquired lands.