Tomb of the Unknowns

Burial of the first official unknown soldier from World War I, on Nov. 11, 1921. Credit: U.S. Army

Arlington's First Official Unknown Soldier

At Arlington National Cemetery, the subject of a WETA television documentary, one of the most haunting features is the Tomb of the Unknowns, also known as the Tomb of the Unknown Soldier.

On the rear of the monument, there's a haunting inscription: Here rests in honored glory, an American soldier known but to God.

But the story of how the first official unknown soldier from World War I was selected for burial in the graves alongside the monument is a strange one. For one, he wasn't actually the first unidentified casualty to be entombed at Arlington.