Perfect 10

4. Trail from independence Missouri to Santa Fe New Mexico in the mid-1800s
6. Sturdy vehicle topped with white canvas and used by pioneers to move west
7. Trail from independence Missouri to Oregon used by many pioneers during the 1840s
10. A period from 1848 to 1856 when thousands of people came to California in order to search for gold.
11. An expedition sent by Thomas Jefferson to explore the northwestern territories of the United States
13. This allowed a settler to acquire 160 acres by living on it for five years, improving it and paying about $30
14. A notion held by a nineteenth-century Americans that the United States was destined to rule the continent, from the Atlantic the Pacific.
16. A policy of extending a country's power and influence through diplomacy or military force.
17. To add or attach

1. A Shoshone woman whose language skills and knowledge of geography helped Lewis and Clark
2. Wrote the Declaration of Independence
3. Across a continent
5. The Cherokee Indians were forced to leave their lands
8. The war between the United States and Mexico in which the United States acquired one half of the Mexican territory.
9. Land from the Mississippi River to the Rocky Mountains purchased from France for 15 million dollars. It doubled the size of the US at the time, getting more land than the US wanted.
12. Form of relocation
15. A period of economic growth