Chapter 12 Review Students should understand the following content in detail for the Chapter 12 Test: 1. I can describe the meaning of Manifest Destiny. 2. I can describe where and how the United States expanded in the 1840s. 3. I can explain what mountain men were doing in the west. 4. I can describe the experiences travelers had on the Oregon Trail. 5. I can explain how the United States acquired the Oregon Country. 6. I can describe why Americans moved to Texas. 7. I can explain why Texans clashed with the Mexican government. 8. I can explain the importance of the Battle of the Alamo. 9. I can describe how the Texans won their independence from Mexico. 10. I can explain how Texas became a state. 11. I can explain why the northerners did not want Texas to be added as a state. 12. I can explain why the United States went to war with Mexico, and the outcome of the war. 13. I can describe the Treaty of Guadalupe Hidalgo. 14. I know where Oregon, Texas, and the Mexican Cession are on a map. 15. I can describe the effects the victory in the Mexican War had on the United States. 16. I can describe why the U.S. made the Gadsden Purchase. 17. I can explain why gold influenced the growth of California. 18. I can describe what life was like for the forty-niners in their quest to find gold. 19. I can explain how many businesses profited from the Gold Rush. 20. I can explain why Mormons moved to the Utah Territory.