Hernán Cortés (c. 1485 – December 2, 1547) was a Spanish conquistador, explorer, and military commander best known for leading the expedition that resulted in the fall of the Aztec Empire in the early 16th century and bringing large portions of Mexico under Spanish rule. Cortés was part of the first generation of Spanish colonizers in the Americas.
Cortés initially sailed to the New World at age 19, later participating in the conquest of Cuba. In 1519, he defied orders and set out to explore Mexico, landing on the Mexican coast in February. Displaying both strategic alliance-building and ruthless force, he aligned some indigenous populations against others and eventually overthrew the vast Aztec empire, capturing their capital, Tenochtitlán, in 1521 and establishing Mexico City on its ruins. As a reward, King Charles I appointed him governor of New Spain in 1522. Cortés also introduced Spanish culture, language, and religion to Mexico.
Despite his achievements, Cortés faced challenges to his authority and spent his later years seeking recognition from the Spanish Crown. He participated in further expeditions in the New World. Recent attention has focused on the legacy of his actions, including the return of stolen historical documents signed by Cortés to Mexico. For example, in August 2025, the FBI returned to Mexico a 500-year-old manuscript page signed by Cortés. The document, dated February 20, 1527, details logistical planning for Cortés's travels in what became New Spain.