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Causes and Effects of the Mexican American War 1846-1848
Transcript of Causes and Effects of the Mexican American War 1846-1848
Causes and Effects of the Mexican-American War (1846-1848)
By: Mustafa Bal and Edith Zhang
What was Manifest Destiny?
Manifest Destiny was the belief that Americans has a God-given destiny to expand across the American Continent.
President James K. Polk
President Polk held the belief of Manifest destiny
He sent John Slidell to buy California and New Mexico-- however, Mexico refused to negotiate
Polk tried to take the area by force
Causes of the Mexican - American War
Effects of the Mexican - American War
Treaty of Guadalupe Hidalgo
The Texas Border Dispute
Texas claimed its border was the Rio Grande River
Mexico insisted it was the Nueces River farther north
Ceded New Mexico and California to the US for $15 million
Established Rio Grande as Texas' southern border
Issues with Texas
Fulfilling the Manifest Destiny
The newly acquired lands seemed to mark the success of the Manifest Destiny.
The United States of America finally extended from the Atlantic Ocean to the Pacific Ocean.
Many Texans wanted annexation with the U.S.
Conflicts within U.S. about slavery
The Thornton Affair
Texas War of Independence
The Battle of San Jacinto
Santa Anna forfeited Texas, allowing its independence.
Mexico refused to recognize this, but it was already done
Lincoln's Spot Resolution
Offered to the House of Representatives by Whig Abraham Lincoln
President Polk had to give the exact location of the bloodshed.
The bloodshed was the reason Polk declared war on Mexico, the location of the massacre can make the war either constitutional or unconstitutional.
Compromise of 1850
The Wilmot Proviso benefited Northerners, angered Southerns
After much debate, "compromise" was made
Pro-North: California was admitted as a free state, New Territory acquired fro the war went to New Mexico
Pro-South: Texas was paid $10 for not getting the recently acquired land, NM and UT got to choose whether they would be a free/slave state
A civil conflict was effectively delayed.
Introduced by David Wilmot, it argued for banning of slavery in the newly acquired territories from Mexico during the war.
Passed in the House, did not pass in the Senate due to the pro-slavery pressure of the Southern states.
Cause of great tension between the North and the South.
Also an early causes of the Civil War
Mexican forces killed 16 American soldiers "on American soil" (actually in disputed territory)
President Polk used this as a reason to declare war on Mexico
Lincoln's spot resolutions
Polk claimed: U.S. territory
Actually on disputed area
Lincoln wanted evidence of the specific "spot"