Texas gives up nonexistent New Mexico counties

Map by Ch1902

(Texas Day by Day) On this day in 1850, Texas gave up its claim to disputed land in New Mexico.
In 1841, seeking a share of the Santa Fe trade, President Mirabeau Lamar dispatched the Texan Santa Fe Expedition to secure the territory for the Republic of Texas, but Mexican authorities captured the entire expedition without firing a shot.
U.S. troops occupied New Mexico during the Mexican War, and in the Treaty of Guadalupe Hidalgo, signed in February 1848, Mexico relinquished all claim to territory north and east of the Rio Grande. Continued