What treaty marked the end of the Mexican-American War?

The Treaty of Guadalupe-Hidalgo, signed in 1848, officially ended the Mexican-American War, which had begun in 1846. This treaty had significant implications as it led to the United States acquiring a vast amount of territory including present-day California, Nevada, Utah, Arizona, and parts of Colorado and New Mexico. The treaty not only resolved the conflict between the two nations but also significantly altered the geographical and political landscape of North America, promoting territorial expansion in the context of Manifest Destiny. This shift in land ownership also raised questions and debates about slavery in the newly acquired territories, which would later contribute to the tensions leading up to the Civil War.

The other treaties listed do not pertain to the Mexican-American War: the Oregon Treaty was related to the border dispute with Great Britain in the Pacific Northwest, the Treaty of Versailles ended World War I, and the Paris Peace Treaty generally refers to agreements that concluded various conflicts, none of which involve the Mexican-American War.