![](https://www.historynet.com/wp-content/uploads/2016/12/Cortes_Assault_2000x577.jpg)
On Aug. 13, 1521, Cortés and his reinforced army swarmed across the causeways of Tenochtitlan to complete the conquest he had begun less than three years earlier (Lebrecht Music & Arts Photo Library/Alamy Stock Photo)
Lebrecht Music & Arts Photo Library/Alamy Stock Photo