When Cortés left Tenochtitlan to return Arriving to the coast and deal Communication with the expedition of Pánfilo de Narváez , sent Sending to rein in Cortés 's expedition that had exceeded Cause_change_of_position_on_a_scale its specified limits , Cortés 's right-hand man Pedro de Alvarado was left Departing in charge .

Alvarado allowed Preventing_or_letting a significant Aztec feast to be celebrated Social_event in Tenochtitlan and on the pattern of the earlier massacre in Cholula , closed Openness off the square and massacred the celebrating Aztec noblemen .

The Alvarado massacre Killing at the Main Temple of Tenochtitlan precipitated rebellion by the population of the city .