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 Private Herbert William Mackmer (ASN: 1712678), United States Army, for extraordinary heroism in action while serving with Company A, 305th Infantry Regiment, 77th Division, American Expeditionary Forces, near Carrefour-de-Meurrussons, France, 27 September 1918. When his platoon encountered intense fire from hostile trench mortars and machine-guns, Private Mackmer took up an exposed position on the flank and, with his automatic rifle, covered the withdrawal of the platoon to a protected position, sacrificing his life in so doing.