Civil war crossword puzzle

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Across
  1. 4. the practice or system of owning slaves.
  2. 5. break away from a nation
  3. 7. Run away
  4. 8. The person who went against Lincoln in 1860
  5. 10. a person who dies for a cause
  6. 12. 16th president
  7. 13. withdrawal
  8. 14. Tax on imports
Down
  1. 1. A book that helped cause the civil war
  2. 2. Slave rebellion that ended out a failure
  3. 3. a person who favors the abolition of a practice
  4. 6. to vote for someone
  5. 9. To join
  6. 11. what southerners considered themselves in the civil war