Mexico and the United States conclude the…

Mexico and the United States conclude the 1848 Treaty of Guadalupe Hidalgo, reluctantly ratified by the U.S. Senate by a vote of 38 to 14 on March 10, 1848 and by Mexico through a legislative vote of 51 to 34 and a Senate vote of 33 to 4, on May 19, 1848.

News that New Mexico's legislative assembly had just passed an act for organization of a U.S. territorial government helps ease Mexican concern about abandoning the people of New Mexico.

The terms ending the two-year Mexican War, a disaster for Mexico, dictate the cession to the US of all Mexican lands north of the Gila River and the Rio Grande—1.2 million square miles (3.1 million kilometers) encompassing Texas, California, New Mexico, and present-day Arizona—at the bargain price of fifteen million dollars.

The US also assumes the standing claims of its citizens against Mexico.