Spanish and European armor at the time of the conquest of Mexico was typically constructed of steel and made into plate metal or chainmail (mail).
16th century European plate armor (left), riveted chainmail armor (right), and Morion helmet (above), all in Spanish style. Personal image taken at the Roswell Museum and Art Center in New Mexico, 2018.
Emperor Montezuma died in a disputed incident shortly before the conquest of Tenochtitlan. According to the Spanish conquistador Bernal Diaz del Castillo, shortly after the massacre of Aztec nobles in the precincts of Tenochtitlan, the Spanish were forced to retreat to their quarters and, following the arrival of Cortes back into the city of Tenochtitlan, they…
Aztecs handling Montezuma’s corpse. Florentine Codex, Book XII.
Video depicting a battle between 2600 Aztec soldiers and 1300 Spanish conquistadors. This is from the video game Medieval 2: Total War Americas,which allows players to create their own battles fought between a number of different militaries, including the Aztecs, Mayans, Chichimecs, Tarascans, Spanish, English, Apache, etc.