3D Infantry (the old guard) Fort Myer , Virginia

• Oldest Active-Duty Infantry Regiment: The 3d U.S. Infantry Regiment, known as "The Old Guard," was established in 1784, making it the oldest active-duty regiment in the U.S. Army. • Primary Mission: The Old Guard is the Army’s official ceremonial unit and escort to the President of the United States, performing ceremonies at the White House, Pentagon, and Arlington National Cemetery. • Tomb of the Unknown Soldier: Members of The Old Guard serve as the Sentinels at the Tomb of the Unknown Soldier at Arlington National Cemetery, maintaining a 24/7 vigil since July 2, 1937. • Home at Fort Myer: The regiment is headquartered at Joint Base Myer–Henderson Hall (formerly Fort Myer) in Virginia, just adjacent to Arlington National Cemetery. • Caisson Platoon: The unit’s Caisson Platoon is responsible for conducting military horse-drawn funeral honors in Arlington National Cemetery, using horses and caissons to transport caskets. • State Funeral Participation: The Old Guard has played a central role in state funerals for presidents and notable Americans, including John F. Kennedy, Ronald Reagan, and George H.W. Bush. • Fife and Drum Corps: The Old Guard’s Fife and Drum Corps is the only unit of its kind in the U.S. armed forces, performing in uniforms patterned after those worn during the American Revolution. • Changing of the Guard: The intricate changing of the guard ceremony at the Tomb of the Unknown Soldier is carried out by Old Guard soldiers, drawing thousands of visitors each year. • Combat Service: Beyond ceremonial duties, The Old Guard has served in every major American conflict since its inception, including the War of 1812, Mexican-American War, and the Civil War. • Regimental Motto: The Old Guard’s motto is "Noli Me Tangere" (Touch Me Not), symbolizing its distinguished heritage and steadfast readiness.