Gilbert is a town in Maricopa County, Arizona, United States, located southeast of Phoenix, within the Phoenix metropolitan area. Once known as the "Hay Shipping Capital of the World", Gilbert is currently the most populous incorporated town in the United States. Wikipedia

Tucson is a city in and the county seat of Pima County, Arizona, United States, and home to the University of Arizona. The 2010 United States Census puts the city's population at 520,116, while the 2013 estimated population of the entire Tucson metropolitan area was 996,544. Wikipedia