"King Cotton", the original seven states that seceded believed they could get Great Britain and France to support the confederacy by controlling the cotton industry. They also thought that the remaining eight slavery states would join them, they didn't they stayed with the union.
Once when preparing for a Spanish test I used repetition to help me study. This technique was useful for me, because when I wrote out vocabulary words and continued to review them until the day of the test it helped me remember the words a lot easier.