How did having Indian allies help Cortes defeat aztez's?

Having Indian allies significantly aided Hernán Cortés in defeating the Aztecs by providing him with critical local knowledge, resources, and manpower. Indigenous groups, often resentful of Aztec dominance and tribute demands, joined Cortés in his campaign, bolstering his forces. Their support facilitated strategic advantages in battles and intelligence about Aztec tactics and territory. Ultimately, these alliances allowed Cortés to exploit divisions among the indigenous peoples and contributed to the fall of the Aztec Empire.