At this time the US went to Defcon 2
A.
Andrew jackson forced them to move, and walk the trail of tears because he felt he was doing the citizens of his country a favor. they were forced out of their homes and to walk thousands of miles west to land jackson provided for them.
The positive effects of getting California is that it's closer to Asia, and California side of the nation at the time could have open territory to conquer.
The biggest city<span> in the </span>world<span> with 36.7 million inhabitants</span>
Answer:
1. Invasions by Barbarian tribes.
2. Economic troubles and overreliance on slave labor.
3. The rise of the Eastern Empire.
4. Overexpansion and military overspending.
5. Government corruption and political instability.
6. The arrival of the Huns and the migration of the Barbarian tribes.
Explanation:
I hope this helps! Good Luck! ;)