treaty-of-guadalupe-hidalgo-18481

THIS DAY IN HISTORY FEBRUARY 2 1848 The Treaty of Guadalupe Hidalgo ended the U.S.-Mexican War. Signed on 2 February 1848, it is the oldest treaty still in force between the United States and Mexico. As a result of the treaty, the United States acquired more than 500,000 square miles of valuable territory and emerged as a world power in the late nineteenth century.