The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pleasure in presenting the Distinguished Service Cross to Lieutenant (MC) Orlando Henderson Petty, United States Navy (Reserve Force), for extraordinary heroism in action while serving as Medical Officer attached to the Fifth Regiment (Marines), 2d Division, American Expeditionary Forces, in France during the attack in the Boise de Belleau, 11 June 1918. While he was treating wounded under bombardment of gas and high-explosive shells, Lieutenant Petty was knocked down and his gas mask torn by a bursting gash shell, but he discarded his gas mask and continued his work. Later, when his dressing station was demolished by another shell, he helped carry a wounded officer through the shellfire to a place of safety.