Title: Expansion and the Mexican-American War | Boundless US History
Headings: Expansion and the Mexican-American War
Expansion and the Mexican-American War
The Mexican–American War, 1846–1848
Learning Objectives
Key Takeaways
Key Points
Key Terms
Background
The War
California, Kearny, and Sloat
Taylor and Scott’s Legacies
Treaty of Guadalupe Hidalgo
Victory in Mexico
Learning Objectives
Key Takeaways
Key Points
Key Terms
Treaty of Guadalupe Hidalgo
Opposition to the Acquisition
Impact of the War
Manifest Destiny
The Politics of Slavery
The California Gold Rush
Learning Objectives
Key Takeaways
Key Points
Key Terms
Seeking Fortune in the West
Effects of the Gold Rush

Content: U.S. Occupation of Mexico City: This 1851 painting by Carl Nebel shows the U.S. occupation of Mexico City, which began after US forces captured the city in September 1847. Treaty of Guadalupe Hidalgo
The Treaty of Guadalupe Hidalgo, signed in February 1848, was a triumph for U.S. expansionism under which Mexico ceded nearly half its land. The Mexican Cession, as the conquest of land west of the Rio Grande was called, included the current states of California, New Mexico, Arizona, Nevada, Utah, and portions of Colorado and Wyoming. Mexico also came to recognize the Rio Grande as the border with the United States. Mexican citizens in the ceded territory were promised U.S. citizenship in the future when the territories they were living in became states. In exchange, the United States agreed to assume $3.35 million worth of Mexican debts owed to U.S. citizens, paid Mexico $15 million for the loss of its land, and promised to guard the residents of the Mexican Cession from American Indian raids. Victory in Mexico
American victory in the Mexican–American war yielded huge acquisition of land and increased domestic tensions over slavery. Learning Objectives
Identify the territories that the United States acquired at the end of the Mexican–American War
Key Takeaways
Key Points
After the U.S. army occupied Mexico City, the Treaty of Guadalupe Hidalgo was negotiated and brought the war to an end. The treaty gave the United States control of Texas, established the border at the Rio Grande, and ceded other Mexican lands to the United States in the southwest.