What Caused The Mexican American War

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The annexation of Texas by the United States provoked the Mexican ambassador to dissolve connections between the two nations. Jose Joaquin Herrera, president of Mexico, wanted to negotiate because he knew his country was not capable of waging war. During negotiations, the two presidents disagreed on the boundaries of Texas. Mexico believed Texas ended at the Nueces River while Polk claimed that the Rio Grande was the western border of Texas, which made Texas larger. While discussions continued, Polk sent General Zachary Taylor to approach the Rio Grande. Polk declared that war would commence once Mexicans crossed the border. Finally, on April 25, 1846, several Mexicans crossed into America, engaged in battle with Taylor which lead to the death of 11 American soldiers. …show more content…

The United States went on to be victorious in battles due to superior American technology. Additionally, the U.S. set up blockades around major Mexican ports to block Mexico from receiving supplies. Despite the successes, many American soldiers were unaccustomed to the different environment and died from heat and disease. After capturing Monterey, Polk attempted renegotiations with Herrera, but was met with contempt, and in February 1847, the two armies met at the Battle of Buena Vista. The battle ended with no victor which meant Herrera failed to meet his goal of destroying Taylor’s wounded army. Eventually, the Treaty of Guadalupe Hidalgo was signed in 1848 and ended the war. It gave the United States the territories of California, Texas, and New Mexico. The Mexican-American War reintroduced the question of the expansion of slavery with the events of the Wilmot Proviso, the debate over California’s statehood, and the Compromise of

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