During the 1860s, the area saw increased population after the U.S. acquired the land from Mexico with the Treaty of Guadalupe Hidalgo in 1848.

Mexican Senate President Gerardo Fernández Noroña displayed a 1830s map showing California and Texas as Mexican territory during the LA immigration debate.

The U.S. actually paid for the states it acquired from Mexico after winning the war and in the Treaty of Guadalupe Hidalgo even agreed to pay the debts they owed American citizens.

It ended with a decisive U.S. victory and the Treaty of Guadalupe Hidalgo, which led to the acquisition of vast territories in the West, including present-day California, Arizona and New Mexico.

It ended with a decisive U.S. victory and the Treaty of Guadalupe Hidalgo, which led to the acquisition of vast territories in the West, including present-day California, Arizona and New Mexico.

In September 1847, the Mexican army accepted defeat and entered into peace negotiations resulting in the Treaty of Guadalupe Hidalgo. Mexico was required to cede 55 percent of its territory which ...

The stately stairway leading to Alton's old City Hall led nowhere after a fire destroyed the 1858 building that housed all of Alton's government offices, including a library and civic auditorium.

Never mind that the folks down across the Rio Grande once owned this Zion before Manifest Destiny and the Treaty of Guadalupe Hidalgo in 1848 legitimized our theft of land—including Utah, where Mormon ...

On Feb. 2, 1848, the war between the United States and Mexico formally ended with the signing of the Treaty of Guadalupe Hidalgo. On Feb. 2, 1848, ...