The Tomb of the Unknowns (also known as the Tomb of the Unknown Soldier) is guarded 24 hours a day, 365 days a year, and in any weather by Tomb Guard sentinels. Sentinels, all volunteers, are considered to be the best of the elite 3rd U.S. Infantry Regiment (The Old Guard), headquartered at Fort Myer, Va.
After members of the 3rd U.S. Infantry Regiment become ceremonially qualified, they are eligible to volunteer for duty as sentinels at the Tomb. If accepted, they are assigned to Company E of The Old Guard. Each soldier must be in superb physical condition, possess an unblemished military record and be between 5 feet, 10 inches and 6 feet, 4 inches tall, with a proportionate weight and build. An interview and a two-week trial to determine a volunteer's capability to train as a tomb guard is required.
During the trial phase, would-be sentinels memorize seven pages of Arlington National Cemetery history. This information must be recited verbatim in order to earn a "walk." A walk occurs between guard changes. A daytime walk is one-half hour in the summer and one hour in the winter. All night walks are one hour.
If a soldier passes the first training phase, "new-soldier" training begins. New sentinels learn the history of Arlington National Cemetery and the grave locations of nearly 300 veterans. They learn the guard-change ceremony and the manual of arms that takes place during the inspection portion of the Changing of the Guard. Sentinels learn to keep their uniforms and weapons in immaculate condition.
The sentinels will be tested to earn the privilege of wearing the silver Tomb Guard Identification Badge after several months of serving. First, they are tested on their manual of arms, uniform preparation and their walks. Then, the Badge Test is given. The test is 100 randomly selected questions of the 300 items memorized during training on the history of Arlington National Cemetery and the Tomb of the Unknowns. The would-be badge holder must get more than 95 percent correct to succeed. Only 400 Tomb Guard Badges have been awarded since it was created in February 1958.
The Tomb Guard Identification Badge is a temporary award until the badge-holding sentinel has honorably served at the Tomb of the Unknowns for nine months. At that time, the award can be made a permanent badge, which may then be worn for the rest of a military career. The silver badge is an upside-down, laurel-leaf wreath surrounding a depiction of the front face of the Tomb. Peace, Victory and Valor are portrayed as Greek figures. The words "Honor Guard" are shown below the Tomb on the badge.
There are three reliefs, each having one relief commander and about six sentinels. The three reliefs are divided by height so that those in each guard change ceremony look similar. The sentinels rotate walks every hour in the winter and at night, and every half-hour in the day during the summer. The Tomb Guard Quarters is staffed using a rotating Kelly system. Each relief has the following schedule: first day on, one day off, second day on, one day off, third day on, four days off. Then, their schedule repeats.