Guadalupe Hidalgo, Treaty of

views updated Jun 08 2018


On February 2, 1848, representatives of the United States and Mexico signed the Treaty of Guadalupe Hidalgo, ending the war between those two countries that had begun two years earlier. This document ceded to the United States almost half of Mexico's national territory in exchange for a payment of fifteen million dollars. The discovery of gold in California a few weeks before the treaty was signed led to a massive western migration that changed the future of the country.

The Treaty of Guadalupe Hidalgo contained provisions promising to protect the civil rights of the more than one hundred thousand Mexicans who lived in the conquered territories. Their lands and ways of life, however, came under attack by the new settlers, and the treaty guarantees were largely ignored. This violation of the treaty fueled decades of conflict, especially over land. Furthermore, the acquisition of new territories intensified conflicts between northern and southern politicians over the extension of slavery. The Compromise of 1850, the Fugitive Slave Law, and the violence surrounding the idea of popular sovereignty, all of which were instrumental in bringing about the Civil War, all resulted from the incorporation of these new territories.

The war between the United States and Mexico broke out in May 1846. Though the causes of this conflict were many, the most important was the spirit of expansionism called manifest destiny. Thousands of Anglo-Americans believed that it was God's will that they should move west across the entire North American continent, occupying lands of Mexicans and Indians and casting their inhabitants aside in the process. For many, manifest destiny had an economic dimension, justifying a more efficient use of natural resources by the industrious Anglo-Americans. Mixed in with this economic motive was an attitude of racial superiority. As one American writer wrote, "The Mexicans are Aboriginal Indians, and they must share the destiny of their race."

Two articles in the treaty promised to protect the private property and provide eventual U.S. citizenship to those living on the land, but these provisions were often disregarded. In California, thousands of gold-rush migrants encroached on "Californio" land grants and demanded that something be done to free up the land so they could claim it. The result was the passage by Congress of the California Land Claims Act of 1851, which set up a three-person commission to adjudicate Mexican land grants in California. Eventually the commission confirmed most of the grants brought before it, but many Mexican landholders lost their land, for only the wealthy could afford the lengthy litigation process. The conflict over the land claims continued until the beginning of the twentieth century, leaving a bitter legacy that many have not forgotten. In the eyes of Mexico and the millions of Hispanos, Tejanos, and Chicanos now living in the United States, the promises made to them were ignored.

With the signing of the Treaty of Guadalupe Hidalgo, the U. S. government had vast lands open for westward expansion. One of the most difficult issues that emerged was the determination of whether these lands would be open to slavery. In 1846, foreseeing this problem, Congressman David Wilmot of Pennsylvania presented what became known as the Wilmot Proviso, urging that Congress prohibit the expansion of slavery into whatever territory the United States might acquire from the war. That bill did not pass, but the issue it raised exacerbated an enormous debate over the future of the American West. Many northerners were opposed to opening the land to slavery, feeling that it should be "free soil." They did not want to compete with slave labor or see southern states expand their power.

Two years after the war ended, California petitioned for statehood, and the Senate had to grapple with the question of whether that state would be slave or free. The result of that debate was the Compromise of 1850. For the next decade, the U.S. government was in conflict over the issue of the expansion of slavery into the western lands. The Treaty of Guadalupe Hidalgo ending the War with Mexico fostered the internal war over slavery, which ultimately led to the outbreak of the Civil War.


del Castillo, Richard. The Treaty of Guadalupe Hidalgo: A Legacy of Conflict. Norman: University of Oklahoma Press, 1990.

Merk, Frederick. Manifest Destiny and Mission in American History, a Reinterpretation. New York: Knopf, 1963.

Pletcher, David M. The Diplomacy of Annexation: Texas, Oregon, and the Mexican War. Columbia: University of Missouri Press, 1973.

Internet Resource

"Treaty of Guadalupe Hidalgo." Avalon Project at Yale Law School. Available from <>.

Richard Griswold del Castillo

See also:Age of Westward Expansion; Compromise of 1850; Polk, James K.

Guadalupe Hidalgo, Treaty of

views updated Jun 08 2018


GUADALUPE HIDALGO, TREATY OF. On 2 February 1848, a senior State Department clerk, Nicholas P. Trist, signed a treaty at the town of Guadalupe Hidalgo (just outside of Mexico City) ending the war with Mexico. The previous fall, Gen. Winfield Scott had completed his advance from Vera Cruz along Mexico's Gulf coast, through the mountains and into the capital, Mexico City.

In April 1847, President James K. Polk had sent Trist, a loyal Democrat, to spy on Scott, a Whig whom Polk feared might oppose him in the election of 1848. After Scott gained the capital, Polk's appetite for Mexican territory seemingly increased, and he considered demanding all of Mexico. In early October 1847, Polk ordered Trist recalled. When Trist learned in November of the recall, he stalled, informed Mexican authorities he had to leave, and got Mexican leaders on 24 January 1848 to agree to earlier U.S. land demands. Trist signed the Treaty of Guadalupe Hidalgo nine days later and sent it to the president. Thus, he negotiated and signed a treaty on behalf of the United States after he had been dismissed from his position.

The treaty called for Mexico to cede more than half its original territory, including the present-day states of California, Arizona, Nevada and Utah and parts of New Mexico, Colorado, and Wyoming. It also made adjustments to the Mexico-Texas border (the Rio Grande became the boundary instead of the Rio Nueces). In all, Mexico ceded more than 500,000 square miles. In return, the United States paid Mexico some $15 million, most of which went to Americans with claims against the Mexican government.

The gain of land from this treaty caused problems in the U.S. Senate because of the deepening debate over the expansion of slavery. Subsequent problems in establishing the U.S.-Mexican border in southern Arizona and New Mexico would be resolved with the Gadsden Purchase in 1853, establishing what is the current boundary.


Bauer, Karl Jack. The Mexican War, 1846–1848. New York: Macmillan, 1974.

Drexler, Robert W. Guilty of Making Peace: A Biography of Nicholas P. Trist. Lanham, Md.: University Press of America, 1991.

Eisenhower, John S.D. So Far from God: The U.S. War with Mexico, 1846–1848. Norman: University of Oklahoma Press, 2000.

Francaviglia, Richard, and Douglas W. Richmond, eds. Dueling Eagles: Reinterpreting the U.S.-Mexican War, 1846–1848. Fort Worth: Texas Christian University Press, 2000.

Charles M.Dobbs

See alsoCompromise of 1850 ; Gadsden Purchase ; Mexican-American War ; Wilmot Proviso .

Guadalupe‐Hidalgo, Treaty of

views updated May 14 2018

Guadalupe‐Hidalgo, Treaty of (1848).The treaty that ended the Mexican War with the United States was signed in Guadalupe‐Hidalgo, a suburb of Mexico City, on 2 February 1848. President James K. Polk had already discharged negotiator Nicholas P. Trist, but the U.S. envoy used his imminent departure to persuade a fragile Mexican provisional government to consent to a substantial loss of territory rather than continuing a disastrous war or risking a more draconian peace. U.S. forces already controlled the capital, the major ports, and the northern half of Mexico. Polk, facing a fractious Congress and fearing the costs of an open‐ended occupation, reluctantly accepted Trist's handiwork.

The U.S. agreed to pay Mexico $15 million and assume adjusted claims of U.S. citizens of $3 million. The territorial settlement—a Río Grande boundary for Texas, and the annexation by the United States of Mexico's northern provinces—New Mexico and Alta California—was the most important and durable legacy of the treaty. The pact's most controversial provisions were those that assured political and religious liberty and the security of property to Mexicans who remained in the transferred territories. During the ratification process, the U.S. Senate modified Article IX, which had originally promised U.S. citizenship to these people “as soon as possible,” and struck out entirely Article X, which had guaranteed Mexican land grants in all of its former territories, including Texas. The U.S. Senate ratified the treaty (38 to 14) on 10 March 1848.

Although U.S. emissaries sought to reassure Mexico through the “Protocol of Querétaro”—signed in that city when the two countries exchanged ratifications of the treaty in May 1848—that civil and property rights were not threatened by the Senate's modifications, these presumed privileges were in fact sharply circumscribed in the decades following the war.
[See also Mexican War.]


David M. Pletcher , The Diplomacy of Annexation: Texas, Oregon, and the Mexican War, 1973.
Richard Griswold del Castillo , The Treaty of Guadalupe Hidalgo: A Legacy of Conflict, 1990.

James E. Crisp

Guadalupe-Hidalgo, Treaty of

views updated May 21 2018

Guadalupe-Hidalgo, Treaty of (1848) Peace settlement ending the Mexican War. Mexico ceded the present US states of Texas, New Mexico, Arizona, California, Nevada, Utah, and parts of Colorado and Wyoming. The USA paid US$15 million in compensation.

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Treaty of Guadalupe Hidalgo