Answer:
Features such as migration of people, invasions, population distribution, and deurbanization characterized this period. The medieval ages had three periods, which include the antiquity, the medieval periods, and the modern period, all of which exhibited different characteristics.
Explanation:
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Wrong question category, please select Mathematics instead of History.
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Europeans carried a hidden enemy to the Indians: new diseases. Native peoples of America had no immunity to the diseases that European explorers and colonists brought with them. Diseases such as smallpox, influenza, measles, and even chicken pox proved deadly to American Indians.
The U.S. entered World War I because Germany embarked on a deadly gamble. Germany sank many American merchant ships around the British Isles which prompted the American entry into the war.
