Hernán Cortés, led an expedition (entrada) to Mexico, which included Pedro de Alvarado, and . The Spanish campaign against the Aztec Empire had its final victory on 13 August 1521, when a coalition army of Spanish forces and native Tlaxcalan warriors led by Cortés and Xicotencatl the Younger captured the emperor Cuauhtemoc and Tenochtitlan, the capital of the Aztec Empire. The fall of Tenochtitlan marks the beginning of Spanish rule in central Mexico, and they established their capital of Mexico City on the ruins of Tenochtitlan. The Spanish conquest of the Aztec Empire was one of the most significant and complex events in world history.