What is The US and Mexico ended their war by signing .?

The US and Mexico ended their war by signing the Treaty of Guadalupe Hidalgo on February 2, 1848. This treaty formally concluded the Mexican-American War and resulted in Mexico ceding a significant portion of its territory to the United States, including present-day California, Arizona, New Mexico, Nevada, Utah, and parts of Colorado and Wyoming. The treaty established the Rio Grande as the border between Texas and Mexico, significantly altering the landscape of North America.