How did the Inca empire grow so large?

The Inca Empire expanded its territory through a combination of military conquests, strategic alliances, and effective administration. They employed skilled military tactics to defeat rival tribes and integrated conquered peoples by offering them benefits, such as protection and access to Inca roads. Additionally, the Incas established a sophisticated system of communication and infrastructure, including extensive road networks, which facilitated trade and governance across their vast empire. This combination of force, diplomacy, and efficient administration enabled the Inca to maintain control over a diverse range of cultures and regions.