Gadsden Purchase
Lordsburg, New Mexico (population 2,797 in 2010), the county seat of Hidalgo County, was in the disputed area before the Gadsden Purchase, and Deming, New Mexico, the county seat of Luna County, was north of both the Mexican and American land claims before the Gadsden Purchase, though the proposed Bartlett–Conde compromise of 1851 would have left Deming in Mexico, or stated in positive terms, the negotiations for the Gadsden Purchase resolved the border disputes with Mexico, as well as transferred this land to the U.S.