The years between 1926 and 1941 saw the steady development of the 40th Infantry Division as the California National Guard. Devoted to the order and stability of the State, and to the defense of the Nation, thousands of its members gave themselves of this service almost completely in lieu of other avocation. Well may the State of California, and the sister States of Utah and Nevada, from whom came the Artillery and other Special Units, take pride in the powerful organization which answered the call of the President in March of 1941. The history here undertaken can but add to that pride. The promise of those earlier days was bravely fulfilled. Sections include: training days at San Luis Obispo; defense and special training; the campaign in the Philippines; the occupation of Korea; and the last days.