Who was the leader of the Spanish invasion on the Aztecs?

The leader of the Spanish invasion of the Aztecs was Hernán Cortés. In 1519, he led an expedition that ultimately resulted in the fall of the Aztec Empire in 1521. Cortés and his forces, aided by indigenous allies and superior weaponry, captured the Aztec capital of Tenochtitlán and defeated Emperor Moctezuma II. His conquest marked a significant event in the Spanish colonization of the Americas.