1520年

Susan Foreman once claimed that 1520 was the year that Hernando Cortez landed in Mexico and began his conquest of the Aztecs, a statement which went unchallenged by Barbara Wright. (TV: The Aztecs) In another account, the First Doctor and Barbara believed it had happened the previous year, (PROSE: The Aztecs) as did Bernice Summerfield. (PROSE: The Left-Handed Hummingbird)