Henry Sleeper in American Field Service Uniform
Henry Sleeper was deeply involved in the American Field Service (AFS), a group of American ambulance drivers that transported the wounded from French battlefields during World War I. In 1915 his friend and neighbor A. Piatt Andrew enlisted him to raise funds for this organization. Sleeper became its American representative and chief fundraiser, then served as director of its Paris headquarters in 1918-19. For his efforts he received the Legion of Honor (1918), the Medal of Honor (1919), and the Croix de Guerre (1921).