Political map of North America & the Caribbean 25 July 1523 (Spanish Consolidation in Mexico): Cortés’ capture of Tenochtitlan (1521) brought an end to the Aztec Empire and made Spain the dominant power in Mexico. Over the next years Cortés (Hernán Cortés) sent out Spanish expeditions, utilizing Tlaxcalan manpower, to assert his authority over Metztitlan, Tututepec, the Tarascan State, the Kingdom of Colliman, and other states.