Joseph R. Beyrle (Russian: Джозеф Вильямович Байерли; romanized: Dzhozef Vilyamovich Bayyerli; August 25, 1923 – December 12, 2004) is the only known American soldier to have served in combat with both the United States Army and the Soviet Red Army in World War II. He took part in Mission Albany, the airborne landings of the 101st Airborne Division on June 5–6, 1944, as a member of the 506th Parachute Infantry Regiment. He was captured by the Germans and sent east as a prisoner of war.

The 506th Infantry Regiment, originally designated the 506th Parachute Infantry Regiment during World War II, is an airborne light infantry regiment of the United States Army. Currently a parent regiment under the U.S. Army Regimental System, the regiment has two active battalions: the 1st Battalion, 506th Infantry Regiment is assigned to the 1st Brigade Combat Team, 101st Airborne Division, and the 2nd Battalion, 506th Infantry Regiment is assigned to the 3rd Brigade Combat Team, 101st Airborne Division.