Kballen. "Map of the Mexican Cession." 6 April 2008. Digital map. Description: The map illustrates the territories ceded by Mexico to the U.S. in 1848 in the Treaty of Guadalupe Hidalgo, marking the end of the Mexican-American War (1846 – 1848). The land lost amounted to one third of Mexico's total territory, including California and the Southwestern United States. Source: Own work.