1st. Battalion 3rd. Infantry

The 1st Battalion, 3rd Infantry Regiment, known as "The Old Guard," is the oldest active-duty infantry unit in the United States Army, originally constituted in 1784. Throughout its distinguished history, the battalion has participated in major conflicts including the War of 1812, the Mexican-American War, the Civil War, and both World Wars. In modern times, The Old Guard is renowned for its ceremonial duties in the National Capital Region, including conducting funerals at Arlington National Cemetery and guarding the Tomb of the Unknown Soldier. The battalion embodies a proud legacy of service, tradition, and honor in both combat and ceremonial roles.