How did the Indians help Cortes defeat the Aztecs?

The Indians, particularly the Tlaxcalans, played a crucial role in helping Hernán Cortés defeat the Aztecs by providing him with vital military support and local knowledge. They were discontented with Aztec rule and allied with Cortés, supplying warriors who bolstered his forces. Additionally, they assisted in logistics and intelligence, enabling Cortés to navigate the region effectively and exploit weaknesses in the Aztec empire. This alliance significantly contributed to the eventual fall of Tenochtitlán in 1521.