Research in the Southwest
By jutley • Sep 1st, 2004 • Category: FeaturesUntil 1821, most of the southwestern United States was part of Spain, then part of an independent Mexico. When the United States annexed the Republic of Texas in 1845, making it the twenty-eighth state, Mexico declared war.
The ensuing war (1846—48) saw Mexico lose large amounts of its territory in western North America, including what is now Texas, New Mexico, and Arizona.