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Unit 5: Period 5: 1844–1877

The Mexican–American War

Explain why the U.S. and Mexico went to war in 1846, what the Treaty of Guadalupe Hidalgo took, and what it meant for slavery, Mexicans and Native peoples.

Topic 5.3 · 15 min read

This lesson comes with the AP United States History plan

In this lesson

  1. 01How the war started
  2. 02How the war was fought and ended
  3. 03Opposition at home and the slavery question
  4. 04What the conquest meant for Mexicans and Native peoples
  5. 05Worked examples
  6. 06Where students lose points
  7. 07On the exam

The first units’ lessons are free. The plan opens every lesson, every practice question with worked solutions, your study plan and calendar, for $14.49 a month. Cancel any time.

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