The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pride in presenting the Distinguished Service Cross (Posthumously) to Mechanic William Henry Mayo (ASN: 110294), United States Army, for extraordinary heroism in action while serving with Company B, 103d Machine-Gun Battalion, 26th Division, American Expeditionary Forces, near Belleau and Givry, France, 18 July 1918. Mechanic Mayo volunteered for duty as runner and while delivering a message to a gun commander whose squad was subject to a terrific artillery and machine-gun barrage, a shell burst, killing or wounding all but two of the squad. Salvaging the essential parts of the gun, Mechanic Mayo asked for and was given permission to join the depleted squad. He remained with it until the objective was reached, when he rejoined his platoon commander as a runner.