The Mexican (1911-17) Campaign Medal (Army). "Authorized on 12 December 1917, to members of the United States Army and National Guard, who served in any of the various engagements or expeditions action against hostile Mexicans in which U.S. troops were killed or wounded between 12 April 1911and 7 February 1917. Regulation full size, current strike medal with pin back broach from the manufacturer that supplies the U.S. Government."