Hernán Cortés, entering province of Tabasco, defeats Tabascan Indians.

Hernán Cortés de Monroy y Pizarro Altamirano, 1st Marquis of the Valley of Oaxaca was a Spanish conquistador who led an expedition that caused the fall of the Aztec Empire and brought large portions of what is now mainland Mexico under the rule of the King of Castile in the early 16th century. Cortés was part of the generation of Spanish explorers and conquistadors who began the first phase of the Spanish colonization of the Americas.

Tabasco, officially the Free and Sovereign State of Tabasco, is one of the 32 Federal Entities of Mexico. It is divided into 17 municipalities and its capital city is Villahermosa.

March 25 is the 84th day of the year in the Gregorian calendar; 281 days remain until the end of the year.