1. Military Specification MIL-S-3001F. (6 November 1964)
The 40th Infantry Division "Sunshine Division" (Picture <b>#6</b>) is a modular division of the United States Army. Following the army's modularization the division has become a four-brigade combat team with National Guardsmen from throughout the Pacific/Western United States and Oceania. Its division headquarters is located at Los Alamitos Joint Forces Training Base in Los Alamitos, California.
After seeing service in World War I as a depot division, it was reorganized as the National Guard division for California, Nevada, and Utah, before seeing service in the Pacific Theatre of World War II. Later, the division served in Korea and some of its units were designated for Vietnam. The division was later reorganized redesigned as a National Guard unit completely within California. Later reorganizations included units from other states. As currently configured, the 40th Infantry Division has oversight and responsibility for the training and readiness of units in California, Oregon, Hawaii, Arizona, Washington, Alaska, New Mexico, Indiana, Nebraska, Nevada, Mississippi, Utah, Guam and the Northern Mariana Islands.