The Battle of Tacuzcalco was a battle on 13 June 1524 fought between a Spanish army under the command of conquistador Pedro de Alvarado and Cuzcatlan fighters under Atlácatl.

In June 1524, Spanish conquistador Pedro de Alvarado embarked on an expedition into modern day El Salvador with the intention of conquering the land for the Spanish Empire.

[2] On 8 June 1524, Alvarado fought and defeated Cuzcatlan fighters under Atlácatl at the Battle of Acajutla.

[1] On 13 June 1524, Alvarado engaged Atlácatl in a second battle at Tacuzcalco.

"[1] Following the battle, Alvarado described the outcome as a "great massacre" and "punishment" of the Pipil warriors.