22 mar 1350 año - The Aztecs build causeways with canals
Descripción:
 These causeways offered very helpful protection from invaders, because they could be raised, which stopped enemies from getting into Tenochtitlan faster and more efficiently. 
Añadido al timeline:
fecha:
22 mar 1350 año
Ahora mismo
 ~ 676 years ago 
Fotos:
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