Well it's in your question it was the North of America, the people who didn't like slaves and thought the south was wrong. Everything term you used is considered for the North of America during the American Civil War.
Answer:
invansions by barbarian tribes
the most straightforward theory for the western rome collaspe pins the fall on a string of miltary
Group A describes results of the California gold rush
Answer: 1620 is the year the Mayflower landed on North American land, whichc was the first european people on america
Explanation: