[daniel1212]

December 29, 1845

The United States annexed the Republic of Texas, admitted as the state of Texas. However, Mexico didn't accept the annexation or the Mexican border with Texas, which provoked the Mexican–American War.

December 13, 1853

On December 13, 1853, Antonio López de Santa Anna signed the Gadsden Purchase (known as Venta de la Mesilla in Mexico). He sold an area of 76,845 km² from the states of Sonora and Chihuahua for $10 million to the United States. The treaty was signed by U.S. President Franklin Pierce on June 24, 1853, and was ratified by the United States Senate on April 25, 1854. https://en.wikipedia.org/wiki/Territorial_evolution_of_Mexico

Area Mexico ceded to the United States in 1848, minus Texan claims. The Mexican Cession consist of present day U.S. states of California, Nevada, Utah, most of Arizona, half of New Mexico, less than half of Colorado, less than half of the southwest of Wyoming https://en.wikipedia.org/wiki/Mexican_Cession

[Vermont Lt]

They should have won the war.

[Verginius Rufus]

I think Santa Anna actually agreed to a larger cession of land in the Gadsden Purchase, but Congress cut it down because Northerners in Congress (I suppose only the senators were involved) were afraid that the territory gained would someday become part of a slave state. The reason the US wanted the land was to make it feasible to have a southern railroad route to the Pacific.