There have been a number of 19th Divisions in the history of the United States Army. * 19th Division: A National Guard division established in early 1917 consisting of Arizona, California, Colorado, Nevada, New Mexico, and Utah. By the end of that same year, the 19th Division became the 40th Division (later 40th Infantry Division). * 19th Division (World War I): Organized in 1918 as a regular army and national army division for World War I, the 19th Division did not go overseas and demobilized in February 1919 at Camp Dodge, Iowa. * 19th Infantry Division: a "phantom" division in World War II.