Columbia subject headings:
Mexico--History--Conquest, 1519-1540.
Spain--History, Military--16th century.
Harvard subject headings:
Aztecs--History
Indians of Mexico--History--16th century.
Mexico--History
Mexico--History--Conquest, 1519-1540
New Spain--History.
Princeton subject headings:
Aztecs--History.
Indians of Mexico--History--16th century.
Mexico--History--Conquest, 1519-1540.
Mexico--History.
New Spain--History.