Percy Moreau Ashburn was a colonel and medical officer in the United States Army. With then Lieutenant Charles Franklin Craig, Ashburn made the link that mosquitoes were involved in the transmission of Dengue fever. As a major, he served as the sixth commanding officer of the Walter Reed General Hospital, and as a colonel, he served as the first commandant of the Medical Field Service School at Carlisle Barracks, Pennsylvania.

Julius A. Penn was a career officer in the United States Army. He attained the rank of brigadier general during World War I, and commanded 170th Infantry Brigade, 85th Division and 76th Infantry Brigade, 38th Division, in addition to serving as Chief of the Personnel Bureau for the American Expeditionary Forces.