Entitled: True sons of freedom by Charles Gustrine, 1918. Lithograph showing African-American soldiers fighting German soldiers in World War I, and head-and-shoulders portrait of Abraham Lincoln above. The U.S. armed forces remained segregated through World War I. Still, many African Americans eagerly volunteered to join the Allied cause following America's entry into the war. By the time of the armistice with Germany on November 1918, over 350,000 African Americans had served with the American Expeditionary Force on the Western Front. One of the most distinguished units was the 369th Infantry Regiment, known as the "Harlem Hellfighters", which was on the front lines for six months, longer than any other American unit in the war. 171 members of the 369th were awarded the Legion of Merit.