Final answer:
Moctezuma II, the emperor of the Aztec Empire, was immediately taken as a prisoner by the Spaniards under Hernán Cortés during the conquest of Mexico.
Step-by-step explanation:
The Spaniards, under the command of Hernán Cortés, immediately took Moctezuma II as a prisoner. Moctezuma II was the emperor of the Aztec Empire, and his capture was a significant event during the Spanish conquest of Mexico.
The Spanish conqueror Cortés had been warmly greeted by Moctezuma II upon his arrival but later took him hostage in an attempt to gain control over the city of Tenochtitlán. Despite the initial welcome, the relationship between the Spaniards and the Aztecs rapidly deteriorated, leading to the imprisonment and eventual death of Moctezuma II.