All three salute the unknown Soldiers. Inscribed on a plaque by the entrance to the quarters - Arlington National Cemetery, Washington, D.C. The Tomb of the Unknown Soldier was established in 1921 with the interment of an unidentified American serviceman slain in World War I. The Guard, Tomb of the Unknown Soldier Identification Badge is a military badge of the United States Army which honors those soldiers who have been chosen to serve as members of the Honor Guard, known as "Sentinels", at the Tomb of the Unknown Soldier. Their dedication to their sacred duty and their eternal vigilance is reflected in the 'Sentinel's Creed'. Then, the relief commander and the relieving sentinel meet the retiring sentinel at the center of the matted path in front of the tomb. That includes sentinels standing guard over the Tomb Of the Unknown soldier day and night,… Arlington National Cemetery is closed to visitors, but its primary mission of honoring veterans continues. Such tombs can be found in many nations and are usually high-profile national monuments.Throughout history, many soldiers have died in war with their remains being unidentified. The Tomb memorializes all U.S. military killed in combat whose names remain undiscovered, often due to severe disfigurement from wounds. The Tomb of the Unknown Soldier has been guarded for 24 hours a day, seven days a week, nonstop since July 2, 1937.The Tomb Sentinels that protect the site are the best of the best the U.S. Army has to offer and nothing short of Armageddon is going to break that discipline. The Tomb of the Unknown Soldier refers to a monument dedicated to the services of an unknown soldier and to the common memories of all soldiers killed in any war. Oldest Living Sentinel at Tomb of the Unknown Soldier Honored "I can’t ask for any more than what I’m already getting," 100-year-old Army veteran Jack Eaton said The Tomb of the Unknown Soldier Guards in Arlington National Cemetery perform their duties 24 hours a day, 365 days a year. As of March 2020, 678 soldiers have been awarded this badge. (The tomb contains the remains of one each for World War I, World War II and the Korean War. The Tomb of the Unknown Soldier is guarded 24 hours a day, 365 days a year, and in any weather by Tomb Guard sentinels. It is the second-least awarded badge in the US Military, after the Astronaut Badge. "The Sentinel's Creed" - Tomb of the Unknown Soldier -- Creed all Tomb Guards learn in training.