100th Anniversary of the Dedication of the Tomb of the Unknown Soldier: The Tomb of the Unknown Soldier in Arlington National Cemetery is dedicated to U.S. service members who have died with their remains unidentified. The Unknown Soldiers laid to rest at the Tomb represent all missing and unknown service members who made the ultimate sacrifice – they not only gave their lives, but also their identities to protect these freedoms. The Tomb is the final resting place for Unknowns from World War I, World War II and the Korean War, and it is guarded at all times.