U.S. expansionists wanted California to thwart any British interests in the area and to gain a port on the Pacific Ocean. Polk authorized Slidell to forgive the $3 million owed to U.S. citizens for damages caused by the Mexican War of Independence and pay another $25 to $30 million for the two territories.
The war officially ended with the February 2, 1848, signing in Mexico of the Treaty of Guadalupe Hidalgo. 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.
Baja California was returned to Mexico in subsequent Treaty of Guadalupe Hidalgo negotiations. California was under U.S. control by January 1847 and formally annexed and paid for by the U.S. in the Treaty of Guadalupe Hidalgo signed in 1848 .
Area Mexico ceded to the United States in 1848, minus Texan claims. The Mexican Cession consisted of present-day U.S. states of California , Nevada, Utah, most of Arizona, the western half of New Mexico, the western quarter of Colorado, and the southwest corner of Wyoming.
On June 14, 1846, American settlers in Sonoma rose up against the Mexican authorities who governed the territory and declared the establishment of the independent California Republic.
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. Gold was discovered in California just days before Mexico ceded the land to the United States in the Treaty of Guadalupe Hidalgo.
On May 13, 1846, the United States Congress declared war on Mexico after a request from President James K. Polk. The U.S. also tried to buy Texas and what was called “ Mexican California” from Mexico , which was seen as an insult by Mexico , before war broke out. Mexico considered the annexation of Texas as an act of war.
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 over whether Texas
Trist ignored the recall order and negotiated terms that allowed the United States to buy California (north of the Baja Peninsula), as well as what amounted to half of Mexico’s territory for $15 million. On February 2, 1848, the Treaty of Guadalupe Hidalgo was signed in Mexico without President Polk’s knowledge.
The state of California was acquired by the United States as part of the Mexican Cession – the land ceded by Mexico to the US in 1848, at the end of the Mexican-American War. The treaty of Guadalupe Hidalgo ended the war, and gave territory to the US .
The land they named “Alta California” was occupied by diverse groups of native people who had inhabited the land for thousands of years. Spanish colonization of “Alta California” began when the Presidio at San Diego, the first permanent European settlement on the Pacific Coast, was established in 1769.
By its terms, Mexico ceded 55 percent of its territory , including parts of present-day Arizona, California, New Mexico , Texas, Colorado, Nevada, and Utah, to the United States . Mexico relinquished all claims to Texas, and recognized the Rio Grande as the southern boundary with the United States .
Santa Anna refused to sell a large portion of Mexico, but he needed money to fund an army to put down ongoing rebellions, so on December 30, 1853 he and Gadsden signed a treaty stipulating that the United States would pay $15 million for 45,000 square miles south of the New Mexico territory and assume private American
With the defeat of its army and the fall of its capital in September 1847, Mexico entered into negotiations with the U.S. peace envoy, Nicholas Trist, to end the war. The treaty called for the United States to pay US$15 million to Mexico and to pay off the claims of American citizens against Mexico up to US $5 million .