Week 5: The Mexican-American War

In this lesson, explore how the U.S. and Mexico went to war over land, borders, and the idea of Manifest Destiny. Learn about key events like Texas joining the U.S., battles over disputed land, and the Treaty of Guadalupe Hidalgo. Understand how the war changed America’s size, raised debates over slavery, and impacted U.S.–Mexico relations for years to come.