The Aztecs, Incas, and Mayans can be considered to be the greatest early American civilizations. All three are similar in many things, but there are a few differences that set them apart. The three civilizations were very similar in various things. They all depended on great armies to expand their borders and protect the homeland. All three had a similar polytheistic religion that was very important to them. The civilizations had strong economies with substantial trade. These civilizations, however, are by no means the same; on the contrary there is a stark contrast between them.
…
