On Memorial Day, 1921, four unknowns were exhumed from four World War I American cemeteries in France. U.S. Army Sgt. Edward F. Younger, who was wounded in combat, highly decorated for valor and received the Distinguished Service Medal in “The Great War, the war to end all wars,” selected the Unknown Soldier of World War I from four identical caskets at the city hall in Chalons-sur-Marne, France, Oct. 24, 1921. Sgt. Younger selected the unknown by placing a spray of white roses on one of the caskets. He chose the third casket from the left. The chosen unknown soldier was transported to the United States aboard the USS Olympia. Those remaining were interred in the Meuse Argonne Cemetery, France.
The Unknown Soldier lay in state in the Capitol Rotunda from his arrival in the United States until Armistice Day, 1921. On Nov. 11, 1921, President Warren G. Harding officiated at the interment ceremonies at the Memorial Amphitheater at Arlington National Cemetery.