American soldiers in a German bunker hold signs reading Chlorkalk (chlorine gas) and Deckel Zu (cover/lid). Captain James C. Hughes took the photograph on January 12,1919 in Les Eparge, France after the end of World War I.
Hughes, a Kansan, is among a select number of soldiers who served in a major military expedition as well as two world wars. As a photographer took more than 600 images documenting his time at the Mexican border in 1916 and in Europe during 1919. As a Japanese prisoner of war in World War II, Hughes kept a daily diary and, upon liberation, brought home items from his imprisonment. He and his family donated most of these items to the Kansas Museum of History.
More information at: https://www.kshs.org/kansapedia/james-clark-hughes/19881