U.S. Senate Ratifies Treaty of Guadalupe Hidalgo
March 10th, 1848
March 10th, 1848

How Long Ago?
177 years, 5 days ago
Location
Washington, D.C., United States
Category
Politics & Government
War/Conflict
Mexican–American War
People
- John C. Calhoun
- Nicholas Trist
Links & References
Tags
U.S. Senate Ratifies Treaty of Guadalupe Hidalgo
The Treaty of Guadalupe Hidalgo was ratified by the United States Senate, officially bringing an end to the Mexican–American War. This treaty, signed in February, ceded large territories from Mexico to the U.S., including present-day California, Arizona, New Mexico, and parts of Colorado, Utah, and Nevada. The ratification process was marked by political debates relating to the expansion of slavery and the future of the newly acquired lands.
Treaty ceded vast territories to the U.S.
Political debates centered on slavery expansion.
Ratified with a vote of 38 to 14 in Senate.
Marked the end of the Mexican–American War.
What Happened?
The Treaty of Guadalupe Hidalgo concluded the hostilities of the Mexican–American War, which had erupted in 1846 over territorial disputes following the annexation of Texas by the United States. Negotiated by U.S. envoy Nicholas Trist, the treaty was signed in February 1848 in the Mexican capital. The agreement represented a massive territorial gain for the United States, transferring approximately 525,000 square miles of land. This acquisition would not only alter the map of North America but also exacerbate the contentious issues surrounding slavery in the new territories.
The treaty faced significant opposition in the U.S. Senate, primarily from those concerned about the extension of slavery into the new territories. Notable figures such as Sen. John C. Calhoun opposed the ratification, fearing it would tip the balance of power in favor of free states. Ultimately, the Senate voted to ratify the treaty on March 10, 1848, with a final tally of 38 in favor and 14 opposed, ensuring its acceptance and paving the way for American westward expansion.
The ratification of the Treaty of Guadalupe Hidalgo marked a significant shift in U.S. foreign policy and territorial ambitions, leading to facilitated migration and settlement in the West. The legacy of the treaty is complex, as it left unresolved issues between the U.S. and Mexico and sowed the seeds for future conflicts over civil rights and land disputes in the newly acquired territories.
Why Does it Matter?
The ratification of the Treaty of Guadalupe Hidalgo significantly reshaped the United States, effectively expanding its territory by one-third. This event is noteworthy as it laid the groundwork for America’s Manifest Destiny doctrine, the belief that U.S. expansion across the continent was both justified and inevitable. The impact of this treaty not only altered national borders but also set the stage for intense debates over slavery, ultimately leading to the Civil War.
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