The U.S.-Mexican War officially ended in 1848 with the signing of the Treaty of Guadalupe Hidalgo, which called for Mexico to surrender more than one-third of its land. The treaty offered Mexicans living in the conquered territory a choice between staying there or returning to Mexico by moving south of the newly drawn borderline. In this fascinating history, Anthony Mora analyzes contrasting responses to the treaty s provisions. The town of Las Cruces was built north of the border by Mexicans who decided to take their chances in the United States. La Mesilla was established just south of the...