Collage: National Defense Act of 1916, war preparations and the Mexico Border Service as a federal response to border skirmishes in southwestern states with Pancho Villa. Identification Information: Clockwise from top left: Military Department-CNG- Machine Gun Co 5th Infantry, 1916, F3416-1-02; Letter dated August 3, 1916 from the Adjutant General to Mrs. Alfort Kuhn of San Francisco regarding California troops being mustered into the service of the United States, Adjutant General Correspondence, 1910-1917 (B3474); Panoramic photograph of the CNG 5th Infantry, "From Mexico," 1916, Alan Vanatta Collection, 95-12-28(f); Military Department-CNG- Machine Gun Co 5th Infantry, 1916, F3416-1-09.