Westward Expansion - Easy

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Across
  1. 4. Large herbivores that roam the Great Plains.
  2. 6. Lewis and Clark followed the ________ River across the Louisiana Territory.
  3. 9. Leader of the Hunkpapa Lakota natives.
  4. 10. The ________ were established in 1835 to protect the frontier.
  5. 11. A slew of settlers headed west in 1849 looking for this.
  6. 12. Famous photographer associated with the American west.
Down
  1. 1. The idea that Americans were divinely ordained to settle the west.
  2. 2. The ________ carried mail between Missouri and California in 1860.
  3. 3. The first national park.
  4. 5. Gen. ________ and his men died at the Battle of Little Bighorn.
  5. 7. Surname of the President during the Mexican-American War.
  6. 8. The 48th state admitted to the Union.