La Noche Triste, meaning 'The Sad Night,' refers to the disastrous retreat of Spanish conquistadors from Tenochtitlan on the night of July 1, 1520. This event marked a significant turning point in the Spanish conquest of the Aztec Empire, highlighting the fierce resistance of the Aztecs and the vulnerabilities of the Spanish forces. The aftermath of this night led to a reevaluation of tactics and strategies by the conquistadors as they faced determined opposition from indigenous forces.