This black-and-white-photograph from 1918 shows chauffeurs from the American Red Cross handing out mail. During the First World War the International Red Cross operated a central information agency which included not only a mail service for soldiers but for example also the handling of shipments and the distribution of materials sent by national Red Cross Societies.
Giving out mail to American Red Cross chauffeurs at garage, Paris; black-and-white-photograph, 1918, photographer: Lewis Wickes Hine; source: Library of Congress, Prints and Photographs Division, https://lccn.loc.gov/2017674732, public domain.