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.

Five months later, on Feb. 2, 1848, Mexico and the United States signed the Treaty of Guadalupe Hidalgo, which carved a jagged new border, nearly 2,000 miles long.

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.

Mexico’s action convinced the U.S. Congress to declare war. In September 1847, the Mexican army accepted defeat and entered into peace negotiations resulting in the Treaty of Guadalupe Hidalgo.

This rare photo recalls Alton’s City Hall, destroyed by a 1924 fire just before planned renovations.

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 ...

Feb. 02 (UPI) -- On this date in history: In 1848, the war between the United States and Mexico formally ended with the signing of the Treaty of Guadalupe Hidalgo.