Eric Walker added Gadsden Purchase - Wikipedia to 1854 Gadsden Purchase

Eric Walker added Climate Change, Migration, and Militarization in Arizona’s Borderlands to a number of topics

Eric Walker added a number of topics and a number of links to New Mexico, and added New Mexico to US states and territories

Eric Walker added a number of topics and a number of links to Mexico, and added Mexico to North America

Eric Walker added a number of topics and a number of links to Arizona, and added Arizona to US states and territories

Eric Walker added Climate Change, Migration, and Militarization in Arizona’s Borderlands and Gadsden Purchase - Wikipedia to Gadsden Purchase, and added Gadsden Purchase to New Mexico, Arizona and Mexico