History puzzle

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Across
  1. 3. Actions that relate to conditions within a nation
  2. 4. a policy of extending a country's power and influence through diplomacy or military force?
  3. 6. Policy to remain free from relationships with other nation
  4. 8. Practice of annexing new territory to increase the size of the mother country
  5. 9. Who did we buy Alaska from?
  6. 11. What event got the united states involved in WW2?
  7. 12. Who blocked Seward's attempt to purchase Greenland,Iceland and territories in the Caribbean?
Down
  1. 1. The practice of conducting negotiations between nations
  2. 2. Actions that relate to the relationships between nations
  3. 5. What year did america start to occupy?
  4. 7. After the civil war Secretary of State William Seward argued that america should push to become a.
  5. 10. What year did America annex in 1899