On 17 May 1947, the administration of NAF Litchfield Park, southwest of downtown Phoenix, Arizona, was placed under Los Alamitos to serve volunteer reserve aviation personnel in the Phoenix-Tucson area. With 1,300 organized reservists, 1,682 inactive reservists, 12 over-aged reservists, 7 women reservists, and 583 station keepers, Los Alamitos remained the largest Naval Air Reserve Station in the United States.