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What Did The Battle At The Rio Grande Cause The Mexican American War?

Decent Essays

TO WHAT EXTENT DID THE BATTLE AT THE RIO GRANDE CAUSE THE MEXICAN AMERICAN WAR?

Leila Elhail
History Extended Essay
12

Introduction April 25,1846 a Mexican Cavalry consisting of 3,000 men ambushed 70 US soldiers under Zachary Taylor’s command at the disputed area between the Nueces River and the Rio Grande. Mexican troops ended up killing 16 American Citizens. This led President James K. Polk to write a letter to Congress asking for a Declaration of War against Mexico on May 11, 1846. In his declaration of war he included the famous quote: “But now, after reiterated menaces, Mexico has passed the boundary of the United States, has invaded our territory and shed American blood upon the American soil. She has proclaimed that hostilities have commenced, and that the two nations are now at war.” Congress approved the Declaration of War after only a few hours of debate, and so on May 13, 1846 the United States of America declared war on Mexico.

Though it seems like the main reason for the Mexican-American war was the shooting between American troops and a Mexican cavalry because of the fact that James K. Polk asked Congress for permission to declare war on Mexico right after the incident and the event was very prevalent in the letter, another reason for the Mexican American War may have been the popular ideology of Manifest Destiny. In 1845 John L. O’Sullivan coined the term Manifest Destiny. Manifest Destiny was the ideology

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