Mexican-American War - 3 Minute History

After gaining independence from Spain in 1821, Mexico faced internal chaos and external threats. The Republic of Texas declared independence in the 1830s, leading to unresolved border disputes. The US, driven by manifest destiny, annexed Texas in 1845, sparking the Mexican-American War. Despite internal opposition, the US quickly advanced, capturing key territories. The Treaty of Guadalupe Hidalgo in 1848 ceded vast lands to the US, setting the stage for the Wild West and the Californian Gold Rush. However, the new territories fueled tensions over slavery, contributing to the US Civil War.

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