Answer:
He invaded Mexico and defeated the Aztecs - Hernán Cortés
Hernán Cortés was a Spanish conquistador who arrived in Modern Day Mexico in 1519, from Cuba, and after a few encounters with some local tribes, he reached the valley of Mexico, the heart of the Aztec Empire. He defeated the Aztecs, and paved the area for further Spanish colonization.
Hispaniola
Hispaniona is an caribbean island, where the modern countries of Dominican Republic and Haiti are located. It was one of the first major islands to be visited by Columbus, and the oldest Spanish city in America was founded there: Santo Domingo.
Atahualpa
Atahualpa was the last Inca Emperor. He was defeated by Francisco Pizarro in 1533, dying in the middle of the central plaza of the city of Cajamarca, in central Peru.
Malintzin
Malintzin was a native american woman from the Mexican coast. He helped Cortes conquered the Aztec empire (she was not aztec, but belonged to another tribe) serving as interpreter, and advisor.
Conquistador
Conquistadors (literally "conquerors" in Spanish), were Spanish men who took up arms, and sailed to the Americas, looking for wealth, and prestige. Many of them were part of the lower nobility, and did not have many opporutnities in Spain. The two most famous conquistadors are Hernan Cortes, who conquered the Aztec Empire, and Francisco Pizarro, who conquered the Inca Empire.