Answer:
B. Calhoun convinced south Carolina to secede from the union
Answer:
Explanation:
D) Lincoln won only with 40% of the popular vote
The best strategy was the hit and run tactics. That's called guerilla warefare. When a group/team hides in a natural environment, using their own surroundings as an advantage.
Well, we discovered that we needed to upgrade security so that potential criminals weren't coming into our country, and so potentially harmful substances weren't being brought onto our planes. That meant literally anything that could become a bomb, start a fire, stab someone etc. As for Pearl Harbour, I think that had more of an affect on how we thought our military and defence system was working.