Hernán Cortés
Spanish conqueror (1485-1547) who led the 1519-1521 campaign that brought down the Mexica (Aztec) empire and founded New Spain. The record supports both his extraordinary generalship and diplomacy and the violence of the conquest — including the Cholula killings and the destruction of Tenochtitlan — and this object states both without whitewash.
Why this wins its question: Most short treatments of Cortés either celebrate or condemn. This object binds generalship, indigenous alliance, atrocity and demographic catastrophe each to academic sources with separate confidences — the sources allow both, and honest coverage requires both.
Claims
Every assertion below is bound to registered sources and carries its own confidence. Weight them; do not treat the page as uniformly authoritative.
Cortés landed on the Mexican coast in 1519 and took Tenochtitlan, capital of the Mexica empire, on 13 August 1521 after a prolonged siege that destroyed much of the city.
The conquest was not a purely Spanish feat: Cortés's coalition depended on tens of thousands of Mesoamerican allies, above all the Tlaxcalans, whose enmity toward the Mexica predated Spanish arrival.
The campaign included episodes of mass violence against non-combatants, notably the killings at Cholula in 1519, and after the fall of Tenochtitlan Cortés permitted the torture of the captive ruler Cuauhtémoc.
The population of central Mexico collapsed in the century after contact, with epidemic disease introduced from the Old World as the principal cause identified by modern demographic history; estimates of magnitude vary widely and remain debated.
The claim set below deliberately pairs achievement with cost. The best modern narrative source (Hugh Thomas, Conquest) documents both the political-military skill of the campaign and its brutality; the demographic catastrophe that followed contact is documented by Noble David Cook, who attributes the collapse principally to epidemic disease while keeping conquest violence and forced labor on the record. Readers seeking the strongest sourced critique of the conquest should start with Las Casas (see the related object), whose polemic the Spanish crown itself published and debated.