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"Southwest: (region, southwestern United States) historically denoting several geographic areas in turn and changing over the years as the nation expanded. After the War of 1812, the Southwest generally meant Missouri, Arkansas, and Louisiana; after Texas was annexed, it, too, was included. In the wake of the war with Mexico, the Southwest embraced most, but not all, of the territory that was acquired under the Treaty of Guadalupe Hidalgo (1848), including land often considered part of the “West”—i.e., New Mexico, Arizona, and all or parts of Oklahoma, Colorado, Utah, and Nevada, as suited the convenience of the user of the term. It ordinarily excludes California." - “Southwest”. Encyclopædia Britannica Inc, July 2, 2020.
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Welcome to the William P. Clements Center for Southwest Studies at Southern Methodist University in Dallas, Texas. Established in fall 1996, the Clements Center promotes research, publishing, teaching, and public programming in a variety of fields of inquiry related to Texas, the American Southwest, and the U.S.-Mexico borderlands.