* 1848 – Mexican-American War: The Treaty of Guadalupe Hidalgo is signed.

Trist successfully negotiated the Treaty of Guadalupe Hidalgo in 1848, which Polk agreed to ratify, ignoring calls from Democrats who demanded that all Mexico be annexed.

In 1848 Senator Davis introduced the first of several proposed amendments to the Treaty of Guadalupe Hidalgo ; this one would annex most of northeastern Mexico and failed with a vote of 44 to 11.

* 1848 – The Treaty of Guadalupe Hidalgo is ratified by the United States Senate, ending the Mexican-American War.

Following the Mexican-American War, from 1846 – 1848 and the Treaty of Guadalupe Hidalgo in 1848, Mexico ceded its mostly unsettled northern holdings, today known as the American Southwest and California, to the United States of America.

On February 2, 1848 California was annexed to the U. S. with the signing of the Treaty of Guadalupe Hidalgo.

Under the later Treaty of Guadalupe Hidalgo in 1848, Mexico formally ceded Alta California and other territories to the United States, and the disputed border of Texas was fixed at the Rio Grande.

US forces took over California in 1846, which came under formal United States control in 1848 with the Treaty of Guadalupe Hidalgo at the conclusion of the Mexican-American War.

In February 1848 Polk surprised everyone with the Treaty of Guadalupe Hidalgo that ended the Mexican-American War and gave the U. S. vast new territories ( including California, Nevada, Utah, and parts of Wyoming, Colorado, Arizona, and New Mexico ).

The area was administered as part of the Spanish, later Mexican, province of Nuevo Mexico until the area was ceded to the United States in 1848 after the Mexican-American war in the Treaty of Guadalupe Hidalgo.

The area now called Four Corners was governed by Mexico following its independence from Spain, until being ceded to the United States by the Treaty of Guadalupe Hidalgo in 1848.

Continued development occurred after 1848 when, as part of the Treaty of Guadalupe Hidalgo following the Mexican-American War, the Mexican government ceded ; 55 % of its pre-war territory ( excluding Texas ) to the US in exchange for $ 15 million.

Mexico ceded the region to the U. S. in the Treaty of Guadalupe Hidalgo in 1848 after the Mexican-American War.

The U. S. Army under Stephen Kearny occupied the territory in 1846 during the Mexican-American War and Mexico recognized its loss to the United States in 1848 with the Mexican Cession in the Treaty of Guadalupe Hidalgo.

In 1848, an attempt to make it part of the Treaty of Guadalupe Hidalgo also failed.

In 1848, the Treaty of Guadalupe Hidalgo ending the war was submitted to the Senate for approval.

At the time gold was discovered, California was part of the Mexican territory of Alta California, which was ceded to the U. S. after the end of the Mexican-American War with the signing of the Treaty of Guadalupe Hidalgo on February 2, 1848.

* 1848: Treaty of Guadalupe Hidalgo cedes Alta California to the United States.

California's acquisition by the United States under the terms of the 1848 Treaty of Guadalupe Hidalgo following the defeat of Mexico in the Mexican – American War caused further American westward expansion into Mexico intensified with the California Gold Rush, beginning in 1849.

The Treaty of Guadalupe Hidalgo assigned the Nueces Strip to Texas in 1848, but outlaws and hostile Indians delayed settlement of the area.

After the Treaty of Guadalupe Hidalgo of 1848 the area became part of San Patricio County.

Mexico ceded the region to the U. S. in the Treaty of Guadalupe Hidalgo in 1848 after the Mexican-American War.

Santa Barbara fell bloodlessly to a battalion of American soldiers under John C. Frémont on December 27, 1846, during the Mexican-American War, and after the Treaty of Guadalupe Hidalgo in 1848 it became part of the expanding United States.

* 1848, February 2-Treaty of Guadalupe Hidalgo officially ends the Mexican-American War.

* 1848, February 2-Treaty of Guadalupe Hidalgo officially ends the Mexican-American War.

The Bastille fortress was transformed between 1824 and 1848 by general Haxo and took on its present-day aspect.

A voivodeship called Serbian Vojvodina was established in 1848 – 1849 ; this was transformed into the Voivodeship of Serbia and Banat of Temeschwar, a land within the Austro-Hungarian Empire from 1849 to 1860.

This situation changed in 1848 when a peaceful revolution took place and established a republic, in the same year that the modern Swiss Confederation was transformed into a federation.

Its constitutional peculiarity had been abolished on December 5, 1848 when it was converted into the Prussian Province of Posen, by way of which it was transformed into one of Prussia's regional subdivisions, but still no part of the German Confederation.

It was elevated to a town in 1832 with the name of " Manaus ", which means " mother of the gods " in tribute to the indigenous nation of Manaós, and legally transformed into a city on October 24 of 1848 with the name of Cidade da Barra do Rio Negro, Portuguese for " The City of the Margins of Black River ".

In 1848, a new Swiss Federal Constitution ended the almost-complete independence of the cantons and transformed Switzerland into a federal state.

The Serbian Vojvodina ( also Serbian Voivodship, Serbian Duchy ) ( Serbian: Српска Војводина, Srpska Vojvodina ) was a short-lived self-proclaimed Serbian autonomous region within the Austrian Empire during the 1848 Revolution, which existed until 1849 when it was transformed into the new ( official ) Austrian province named Voivodeship of Serbia and Banat of Temeschwar.

Since 1848, the Rio Grande has marked the boundary between Mexico and the United States from the twin cities of El Paso, Texas, and Ciudad Juárez, Chihuahua, to the Gulf of Mexico.

July 1848, Secretary of War William L. Marcy wanted a military post established on the north side of the Rio Grande.

July 1848, Secretary of War William L. Marcy wanted a military post established on the north side of the Rio Grande.

In the late 18th century, when the area was associated with a large amount of land situated along the lower basin of the Rio Hondo area in Los Angeles County, Bell Gardens was once a bustling agricultural center for Californios during the Spanish Empire, 1509 – 1823, the Mexican government, 1823 – 1848, and the United States, after the Mexican-American war concluded in 1848.

The 35, 500 acre Rancho Rio De Los Americanos was granted to William Leidesdorff in 1844, but he died in 1848, leaving the Rancho and some properties in SFO to his heirs.

From its founding, in 1848, until the Texas Mexican Railroad opened up in 1883, Rio Grande City was one of the most significant hubs of trade between Texas and Mexico, and was one of the major contemporary contributors to the American romanticized concept of the “ wild West .”

Between 1848 and 1856 more than 10, 000 refugees crossed the Rio Hondo, the river that now serves as a boundary between Belize and Mexico.

The Mexican Cession of 1848 is a historical name in the United States for the region of the present day southwestern United States that Mexico ceded to the U. S. in the Treaty of Guadalupe Hidalgo in 1848, but had not been part of the areas east of the Rio Grande which had been claimed by the Republic of Texas, though the Texas Annexation resolution two years earlier had not specified Texas's southern and western boundary.

On November 13 of 1832, the place of the bar became the category of town with the name of the town of Manaus and on October 24 of 1848, with Law 145 of the Provincial Assembly Paraense, acquired the name of the Bar of the City of Rio Negro.

New Laredo was founded on May 15, 1848, by seventeen Laredo families who wished to remain Mexican and therefore moved to the Mexican side of the Rio Grande.