Question: Cristóbal de Tapia was sent to investigate the conduct of the leader of an expedition that caused the fall of what?
Sentence (from "Hernán Cortés"): Hernán Cortés de Monroy y Pizarro Altamirano, Marquis of the Valley of Oaxaca (] ; 1485 – December 2, 1547) was a Spanish "Conquistador" who led an expedition that caused the fall of the Aztec Empire and brought large portions of mainland Mexico under the rule of the King of Castile in the early 16th century.
Relevant evidence: Yes