Who was the leader of the spanish that defeat the Aztecs?

The leader of the Spanish forces that defeated the Aztecs was Hernán Cortés. In 1519, he led an expedition that resulted in the fall of the Aztec Empire, primarily through a combination of military strategy, alliances with local tribes, and the spread of diseases that weakened the indigenous population. Cortés captured the Aztec capital, Tenochtitlán, in 1521, marking a significant moment in the Spanish colonization of the Americas.