Pre civil war

3. (A tract of public land claimed by a settler under the Homestead Act)
4. (An agreement between opposing parties to resolve a dispute)
6. (The act of incorporating a territory into an existing political unit)
8. (The belief that the US was destined to expand across North America)
9. (An area of land under the jurisdiction of a ruler or government)
10. (An act of violent or open resistance against an established government)
12. (A formal agreement between two or more countries)
13. (A large estate where crops are grown, often with the use of slave labor)
14. (A person who is among the first to explore or settle a new area)
15. (A period of rapid migration to an area where gold has been discovered)

1. (The act of a state withdrawing from a larger political union)
2. (The act of freeing someone from slavery)
5. (The practice of owning people and forcing them to work without pay)
7. (A person who wanted to end slavery)
11. (The process of a country increasing in size by acquiring new territories)