how did the mexican american war change the course of american politics

by Addison Greenholt 6 min read

The U.S.-Mexican War (1846-1848)
The Mexican-American war (1846-1848) changed the slavery debate. It almost doubled the size of the United States and began a debate, between Northerners and Southerners, over what to do with the newly acquired land.

How did political differences affect the Mexican-American War?

Political differences seriously impeded Mexicans in the conduct of the war, but there was no disunity on their national stance.

Why did the US win the Mexican War?

The Mexican War lasted one and a half years, and ranged all throughout Texas, New Mexico, and California, and even into the Mexican interior. Mexican resistance was stubborn and benefited from greater manpower than US forces, but ultimately proved futile. The US won an easy victory due to superior artillery and leadership.

How did the Mexican-American War start?

The Mexican-American War Begins On April 25, 1846, Mexican cavalry attacked a group of U.S. soldiers in the disputed zone under the command of General Zachary Taylor, killing about a dozen. They then laid siege to an American fort along the Rio Grande.

How did the Mexican-American War end?

On February 2, 1848, the Treaty of Guadalupe Hidalgo was signed which officially ended the Mexican-American War. However, as the guns fell silent, and the men returned home, a new war was brewing, one that continues to shape the course of this country to this day.

How did the Mexican-American War changed the US?

What did the U.S. gain by winning the Mexican-American War? Under the Treaty of Guadalupe Hidalgo, which settled the Mexican-American War, the United States gained more than 500,000 square miles (1,300,000 square km) of land, expanding U.S. territory by about one-third.

What changed after the Mexican-American War?

The treaty added an additional 525,000 square miles to United States territory, including the land that makes up all or parts of present-day Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming. Mexico also gave up all claims to Texas and recognized the Rio Grande as America's southern boundary.

What did the US gain from the Mexican-American War?

Mexico received a little more than $18 million in compensation from the United States as part of the treaty. The pact set a border between Texas and Mexico and ceded California, Nevada, Utah, New Mexico, most of Arizona and Colorado, and parts of Oklahoma, Kansas, and Wyoming to the United States.

How did the Mexican-American War change the US and lead to the accomplishment of Manifest Destiny?

By the end of the war, Mexico would lose almost half its territory to the U.S., including lands from Texas to California. The war was a key event in American History as it fulfilled its 'manifest destiny', encompassing land from the Atlantic Ocean to the Pacific.

What was the impact of the Mexican Cession on American politics?

Following the Mexican-American War, the Mexican Cession impacted American Politics in several ways, including the Wilmot Proviso, the issue of slavery, and the focus of sectionalism in the United States. All of these impacts fueled sectionalism and the Southern section's desire for secession from the union.

What were the most important consequences of the Mexican-American War?

By the Treaty of Guadalupe-Hidalgo (February 2, 1848), Mexico accepted the Rio Grande as its boundary. The treaty also gave the United States Mexico's northern provinces of California and New Mexico. The United States thus acquired vast mineral wealth, especially gold, and extended its border to the Pacific Ocean.

What were the effects of the war with Mexico?

The treaty effectively halved the size of Mexico and doubled the territory of the United States. This territorial exchange had long-term effects on both nations. The war and treaty extended the United States to the Pacific Ocean, and provided a bounty of ports, minerals, and natural resources for a growing country.

What did America gain from the Mexican War quizlet?

That the US got the Mexican Cession and the disputed territory of Texas and in return paid Mexico $15 million.

How did the Mexican-American War lead to greater sectionalism within the United States government?

How did the Mexican-American War lead to greater sectionalism within the United States government? There was great tension between pro-slavery and anti-slavery representatives over how new territories won would handle the issue of slavery.

Why was the Mexican-American War important?

The Mexican-American War, waged between the United States and Mexico from 1846 to 1848, helped to fulfill America's "manifest destiny" to expand its territory across the entire North American continent.

What was one outcome of the US Mexican War?

Treaty of Guadalupe Hidalgo Ends the Mexican-American War Finally, on Feb. 2, 1848, the Treaty of Guadalupe Hidalgo was signed, establishing the Rio Grande and not the Nueces River as the U.S.-Mexican border.

What were some of the causes and effects of the Mexican-American War?

In short, the Mexican-American War was caused because of the United States' repeated encroachment on Mexican territory, such as its' annexation of Texas, which Mexico refused to recognize as being independent. Therefore, Mexico also refused to recognize the claimed border between the two nations.

What was the Mexican-American War?

The Mexican-American War was a conflict between the United States and Mexico, fought from April 1846 to February 1848. Won by the Americans and dam...

What did the Mexican-American War have to do with Manifest Destiny?

The concept of Manifest Destiny held that the United States had the providential right to expand to the Pacific Ocean. In 1845 the U.S. annexed the...

Was there opposition to the Mexican-American War within the United States?

Democrats, especially those in the Southwest, strongly favoured the Mexican-American War. Most Whigs, however, viewed the war as conscienceless lan...

What did the U.S. gain by winning the Mexican-American War?

Under the Treaty of Guadalupe Hidalgo, which settled the Mexican-American War, the United States gained more than 500,000 square miles (1,300,000 s...

How did the Mexican-American War increase sectionalism in the United States?

The Mexican-American War reopened the slavery-extension issue, which divided the North and South and which had been largely dormant since the Misso...

When did the Mexican American war start?

The Mexican-American War Begins. On April 25, 1846 , Mexican cavalry attacked a group of U.S. soldiers in the disputed zone under the command of General Zachary Taylor, killing about a dozen. They then laid siege to an American fort along the Rio Grande.

What was the name of the treaty that ended the Mexican-American War?

Treaty of Guadalupe Hidalgo Ends the Mexican-American War. The Mexican-American War (1846-1848) marked the first U.S. armed conflict chiefly fought on foreign soil. It pitted a politically divided and militarily unprepared Mexico against the expansionist-minded administration of U.S. President James K.

What territory did Mexico sell to the US?

Under the treaty, Mexico also recognized the U.S. annexation of Texas, and agreed to sell California and the rest of its territory north of the Rio Grande for $15 million plus the assumption of certain damages claims.

What states did the US lose in the Rio Grande?

A border skirmish along the Rio Grande started off the fighting and was followed by a series of U.S. victories. When the dust cleared, Mexico had lost about one-third of its territory, including nearly all of present-day California, Utah, Nevada, Arizona and New Mexico.

Why did the US decline to join the Union?

Initially, the United States declined to incorporate it into the union, largely because northern political interests were against the addition of a new slave state. The Mexican government was also encouraging border raids and warning that any attempt at annexation would lead to war.

Where did the Aztecs march?

They then began marching toward Mexico City , essentially following the same route that Hernán Cortés followed when he invaded the Aztec empire. The Mexicans resisted at Cerro Gordo and elsewhere, but were bested each time. In September 1847, Scott successfully laid siege to Mexico City ’s Chapultepec Castle.

Who argued that Texas should be annexed?

Nonetheless, annexation procedures were quickly initiated after the 1844 election of Polk, who campaigned that Texas should be “re-annexed” and that the Oregon Territory should be “re-occupied.”. Polk also had his eyes on California, New Mexico and the rest of what is today the U.S. Southwest.

What was the Mexican American War?

See all videos for this article. Mexican-American War, also called Mexican War, Spanish Guerra de 1847 or Guerra de Estados Unidos a Mexico (“War of the United States Against Mexico”), war between the United States and Mexico (April 1846–February 1848) stemming from the United States’ annexation of Texas in 1845 and from a dispute ...

How long did the Mexican American war last?

The Mexican-American War was a conflict between the United States and Mexico, fought from April 1846 to February 1848. Won by the Americans and damned by its contemporary critics as expansionist, it resulted in the U.S. gaining more than 500,000 square miles (1,300,000 square km) of Mexican territory extending westward from the Rio Grande to ...

What was the point of the Whigs' challenge to Polk?

Indeed, from the outset, Whigs in both the Senate and the House challenged the veracity of Polk’s assertion that the initial conflict between U.S. and Mexican forces had taken place in U.S. territor y. Further, legislators were at odds over whether Polk had the right to unilaterally declare that a state of war existed.

What did the Mexican American War have to do with manifest destiny?

What did the Mexican-American War have to do with Manifest Destiny? The concept of Manifest Destiny held that the United States had the providential right to expand to the Pacific Ocean. In 1845 the U.S. annexed the Republic of Texas, which had won de facto independence from Mexico in the Texas Revolution (1835–36).

Who was the leader of the Mexican government who refused to pay the U.S. claims?

James K. Polk. Library of Congress, Washington D.C. (LC-DIG-pga-11757) On May 9, 1846, Polk began to prepare a war message to Congress, justifying hostilities on the grounds of Mexican refusal to pay U.S. claims and refusal to negotiate with Slidell.

Who ordered troops to occupy the Nueces?

When Polk learned of the snub, he ordered troops under Gen. Zachary Taylor to occupy the disputed area between the Nueces and the Rio Grande (January 1846). Proclamation by President James Polk printed in a leaflet declaring the United States to be at war with Mexico, printed in 1846. On May 9, 1846, Polk began to prepare a war message to Congress, ...

Who was the president of the United States in 1846?

Proclamation by President James Polk printed in a leaflet declaring the United States to be at war with Mexico, printed in 1846. On May 9, 1846, Polk began to prepare a war message to Congress, justifying hostilities on the grounds of Mexican refusal to pay U.S. claims and refusal to negotiate with Slidell.

How much did the Mexican government pay for the Louisiana Territory?

The United States received the disputed Texan territory, as well as New Mexico territory and California. The Mexican government was paid $15 million — the same sum issued to France for the Louisiana Territory. The United States Army won a grand victory.

Who led the war in the US?

Polk directed the war from Washington, D.C. He sent a 4-prong attack into the Mexican heartland. John Fremont and Stephen Kearny were sent to control the coveted lands of California and New Mexico. Fremont led a group of zealous Californians to declare independence even before word of hostilities reached the West.

What was the end of the American century?

The End of the American Century. 29d. The Mexican-American War. General Winfield Scott's entrance into Mexico City, September 14, 1847, is depicted in this print by Carl Nebel. When war broke out against Mexico in May 1846, the United States Army numbered a mere 8,000, but soon 60,000 volunteers joined their ranks.

Why did the Mexican American war happen?

He and others who opposed the war, like Transcendentalist writer Henry David Thoreau, knew that the Mexican-American War happened because of the country's rabid lust for expansion of territory and power known as Manifest Destiny. However, not everyone had the same negative opinion of the war.

What happened after the Mexican American War ended?

As History.com notes, Mexico City had fallen to the American forces in September of 1847, prompting the surrender of the Mexican army and the initiation of peace talks between the two countries.

What is the Lost Cause of the Confederacy?

There are those who believe in the Lost Cause of the Confederacy — a pseudo-history propagating a false narrative of southern victory in the Civil War and good intentions for hateful practices like slavery — and then there are those who believe the truth.

How much money did the US get from the Mexican American War?

The United States' part of the deal was a $15 million payment and the agreement to take on the debts the Mexican government had to American citizens. But, in addition to greatly expanding the United States' boundaries, the end of the Mexican-American War had other consequences that altered the course of its history, ...

When did Mexico City fall to the US?

As History.com notes, Mexico City had fallen to the American forces in September of 1847, prompting the surrender of the Mexican army and the initiation of peace talks between the two countries.

Did Mexico abandon Texas?

Not only did Mexico abandon any claims it had previously held to the contested state of Texas — ultimately agreeing to the Rio Grande as its southern boundary — the country also lost another 525,000 square miles of territory west of Texas.

Did everyone have the same negative opinion of the war?

However, not everyone had the same negative opinion of the war. As they are wont to do, Americans were divided in their support or disapprobation of the conflict, and once it was finally over, they had even more to argue about. Now there was the question of slavery.

Who ordered the advance of the Mexican-American War?

In July 1845 President Polk ordered American troops to advance west of the Nueces. Mexican-American War: U.S. declaration of war. Proclamation by President James Polk printed in a leaflet declaring the United States to be at war with Mexico, printed in 1846.

Who ordered the invasion of Mexico?

Polk also ordered General Winfield Scott to move his army by sea to Veracruz, Mexico, capture the city, and march inland to Mexico City. Scott followed the plan, meeting resistance at Cerro Gordo and Contreras, and entered Mexico City in September 1847. The fighting was at an end.

What did Polk say about Mexico?

Polk claimed to Congress that Mexico had “invaded our territory and shed American blood on American soil.”. The United States declared war on Mexico on May 13. The war stirred nationalistic feelings in Mexico, and the country rallied to support the army, even though the army was badly equipped to fight a war.

What was the boundary of Mexico in 1848?

The fighting was at an end. By the Treaty of Guadalupe-Hidalgo (February 2, 1848), Mexico accepted the Rio Grande as its boundary. The treaty also gave the United States Mexico’s northern provinces of California and New Mexico.

Who favored the war in the Southwest?

The United States entered the war divided. Democrats, especially those in the Southwest, strongly favored the conflict. Many in the rival Whig Party, however, viewed Polk’s motives as conscienceless land grabbing.

What was the belief that the country was destined to stretch westward to the Pacific Ocean and beyond?

Many Americans had by that time adopted an idea known as Manifest Destiny , the belief that the country was “destined” to stretch westward to the Pacific Ocean and beyond. Over several decades Mexico had mishandled the governance of California, making settlers there unhappy with Mexican rule.

What was the Mexican War?

When the United States admitted Texas to the Union in 1845, the Mexican government was in such turmoil that the nation's new leader would not even meet with the Americans; they were too weak even to negotiate concessions. Both sides awaited the outbreak of violence. On May 9, 1846, President James K. Polk received word that Mexican forces had ambushed two of General Zachary Taylor's companies along the Rio Grande. He immediately demanded that Congress appropriate funds for war, proclaiming that the Mexicans had initiated a full- blown conflict. Somewhat reluctantly, Congress agreed, and the Mexican War began.

How long did the Mexican War last?

The Mexican War lasted one and a half years, and ranged all throughout Texas, New Mexico, and California, and even into the Mexican interior. Mexican resistance was stubborn and benefited from greater manpower than US forces, but ultimately proved futile.

What did Polk see in the Mexican War?

Polk saw in a Mexican War the opportunity to advance toward California and New Mexico and complete the American sweep West. Reports from California suggested that the citizens there would accept American rule. Many Whig members of Congress believed that Polk was escalating a small skirmish into a call for general war for the purpose of expansion and the extension of slavery into the West. However, remembering that the Federalists had destroyed their party by opposing the War of 1812, many reluctantly went along with Polk's demands for appropriations.

Why did Polk create many enemies in the North through his lack of support for tariffs and in the West for his failure

Polk created many enemies in the North through his lack of support for tariffs and in the West for his failure to initiate internal improvement. However, expansion and the future of slavery generated far greater conflict during the pre-Civil War era.

How much did the US pay Mexico for the Mexican war?

In return, the US assumed all monetary claims of US citizens against the Mexican government and paid Mexico $15 million. The West was now officially open and secure to Americans. Despite patriotism engendered by the war, sectional conflict grew more dramatic between 1846 and 1848. Not all of this was due to expansion.

Why did the US win the Treaty of Guadalupe Hidalgo?

The US won an easy victory due to superior artillery and leadership. The Treaty of Guadalupe Hidalgo, signed February 2, 1848, ceded Texas, New Mexico, and California to the US, completing American claims to land all the way across the continent. In return, the US assumed all monetary claims of US citizens against the Mexican government ...

Who won the presidency of the Southern Democrats in 1848?

In the election of 1848, Zachary Taylor won the presidency as the Whig candidate.

What aspect of the Spanish American War is no one talking about?

An aspect of the Spanish-American War which no one talks about is the relationship between the U.S. and Britain. Before the Spanish-American War, while respecting the Monroe Doctrine, Britain had aspirations in the Americas.

What was the Spanish American War?

The Spanish American War was about power, but it was the power to protect or for protection of America's future. It inadvertently led decades later to rescue of the victims of a very viciously brutal Japanese military. America had allies, but make no mistake, primarily U.S. forces bore the brunt of defeating Japan.

Why did Britain start to recognize America as an independent colonial power?

This change in the British attitude occurred for a couple of reasons. The first reason was that Britain was afraid of the challenge of the German Empire.

What was the Gunboat policy?

He tried to pull out the troops but, later realized the need to intervene, unofficially tried to implement US economic policies into Latin American countries and, further use the “Gunboat” Policy to carry out the plans such as sending John J. Pershing to Mexico and deploying marines to Guatemala.

What did the British do to help the Spanish-American War?

The British supported America's actions during the Spanish-American War. Mainly, Britain backed the American invasions of Cuba and the Philippines. They saw America as a much more worthy nation to ally with than Spain. In this sense, Britain started to recognize America as an independent colonial power.

How many times was the Isla de Luzón hit?

The Reina Cristina and Castilla suffered 81 hits between them, the Don Antonio de Ulloa was hit 33 times, the Don Juan de Austria 13, the Marques del Duero 10, the Isla de Cuba five and the Isla de Luzón was hit three times. Now a hit rate of 2.5 percent was recognized at the time as quite unacceptable.

Which war deepened US foreign policy?

It could only be said that the Spanish-American War further deepen US foreign policy in its interventionist term. If you would like to trace up the root of American expansionism in the Post-Bellum era, Alaska would be the first.

image

Overview

The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the Intervención estadounidense en México (U.S. intervention in Mexico), was an armed conflict between the United States and Mexico from 1846 to 1848. It followed the 1845 U.S. annexation of Texas, which Mexico considered Mexican territory since the Mexican government did not re…

Background

Mexico obtained independence from the Spanish Empire with the Treaty of Córdoba in 1821 after a decade of conflict between the royal army and insurgents for independence, with no foreign intervention. The conflict ruined the silver-mining districts of Zacatecas and Guanajuato, so that Mexico began as a sovereign nation with its future financial stability from its main export destroy…

Prelude

By the Treaties of Velasco made after Texans captured General Santa Ana after the Battle of San Jacinto, the southern border of Texas was placed at the "Rio Grande del Norte." The Texans claimed this placed the southern border at the modern Rio Grande. The Mexican government disputed this placement on two grounds: first, it rejected the idea of Texas independence; and second, it claimed that the Rio Grande in the treaty was actually the Nueces River, since the curre…

Preparation for war

The Mexican Army emerged from the war of independence as a weak and divided force. Only 7 of the 19 states that formed the Mexican federation sent soldiers, armament, and money for the war effort, as the young Republic had not yet developed a sense of a unifying, national identity. Mexican soldiers were not easily melded into an effective fighting force. Santa Anna said, "the leaders of t…

Outbreak of hostilities

President Polk ordered General Taylor and his forces south to the Rio Grande. Taylor ignored Mexican demands to withdraw to the Nueces. He constructed a makeshift fort (later known as Fort Brown/Fort Texas) on the banks of the Rio Grande opposite the city of Matamoros, Tamaulipas.
The Mexican forces prepared for war. On April 25, 1846, a 2,000-man Mexican …

President Polk ordered General Taylor and his forces south to the Rio Grande. Taylor ignored Mexican demands to withdraw to the Nueces. He constructed a makeshift fort (later known as Fort Brown/Fort Texas) on the banks of the Rio Grande opposite the city of Matamoros, Tamaulipas.
The Mexican forces prepared for war. On April 25, 1846, a 2,000-man Mexican …

Reaction in the United States

In the United States, increasingly divided by sectional rivalry, the war was a partisan issue and an essential element in the origins of the American Civil War. Most Whigs in the North and South opposed it; most Democrats supported it. Southern Democrats, animated by a popular belief in Manifest Destiny, supported it in hope of adding slave-owning territory to the South and avoidin…

U.S. invasions on Mexico's periphery

After the declaration of war on May 13, 1846, United States Army General Stephen W. Kearny moved southwest from Fort Leavenworth, Kansas, in June 1846 with about 1,700 men in his Army of the West. Kearny's orders were to secure the territories Nuevo México and Alta California.
In Santa Fe, Governor Manuel Armijo wanted to avoid battle, but on August 9, C…

Scott's invasion of Mexico's heartland

Rather than reinforce Taylor's army for a continued advance, President Polk sent a second army under General Winfield Scott. Polk had decided that the way to bring the war to an end was to invade the Mexican heartland from the coast. General Scott's army was transported to the port of Veracruz by sea to begin an invasion to take the Mexican capital. On March 9, 1847, Scott performed the fir…