Which treaty ended the Mexican-American War?

The Treaty of Guadalupe Hidalgo, signed in 1848, formally ended the Mexican-American War. This significant treaty established the border between the United States and Mexico, resulting in the U.S. gaining vast territories, including present-day California, Nevada, Utah, Arizona, New Mexico, and portions of Colorado and Wyoming.

This treaty was crucial in shaping the future of the United States by expanding its territory significantly, reflecting the concept of Manifest Destiny, which was prevalent at the time. The annexation of these territories contributed to economic development and settlement patterns in the Western United States but also intensified debates over slavery in the newly acquired lands, setting the stage for future conflicts that ultimately led to the Civil War.

The other treaties mentioned do not pertain to the Mexican-American War. The Treaty of Paris was related to the conclusion of the Revolutionary War, the Treaty of Versailles dealt with World War I, and the Adams-Onís Treaty was an agreement between the U.S. and Spain regarding territorial issues in the early 19th century. Thus, the Treaty of Guadalupe Hidalgo is distinctly the treaty that resolved the conflict of the Mexican-American War.