The fall of the Mongols and the fall of the Byzantine Empire which led to decrease in trade. Hope this helps :)
A atomic bomb it wasnt invented till 1945 ww1 was1916
Answer:The Aztecs and Mayans were two Mesoamerican civilizations that had much in common. Both civilizations observed 365 day calendars with similar markings and day/month symbols. They also both worshipped a pantheon of gods during religious ceremonies, some of which involved human sacrifice.
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