Red Cross Our Greatest Mother Join WWIOriginal antique World War One Red Cross recruitment poster Our Greatest Mother Join! Design features a Red Cross nurse sitting next to a young girl with four horsemen of the apocalypse riding in a dark sky over a river between trees and towns in the background. The American Red Cross ARC was formed in 1881 as non profit humanitarian organization founded by the American Civil War nurse Clara Barton (Clarissa Harlowe Barton; 1821 1912). Printed by