1st Battalion, 503rd Infantry Regiment
The 1st Battalion, 503rd Infantry Regiment (1–503rd IR) is an active duty airborne infantry battalion in the United States Army, assigned to the 173rd Airborne Brigade Combat Team and stationed in Vicenza, Italy. The battalion has served with the 2nd Infantry Division, the 11th Airborne Division, the 24th Infantry Division, the 82nd Airborne Division, and the 173rd Airborne Brigade; has been stationed in Korea, Italy and the United States; and earned campaign credits in World War II, the Vietnam War, Operation Enduring Freedom-Afghanistan, and Operation Iraqi Freedom. History. The lineage of Company A, 503rd  AIR, was reorganized and redesignated on 1 March 1957 as Headquarters and Headquarters Company, 1st Airborne Battle Group, 503rd Infantry, and remained assigned to the 11th Airborne Division (organic elements concurrently constituted and activated). On 1 July 1958 the 1st ABG, 503rd Infantry was relieved from assignment to the 11th Airborne Division and assigned to the 24th Infantry Division when the 11th was reflagged as the 24th. The battle group's stay was short, and on 7 January 1959 it was relieved from assignment to the 24th Infantry Division and assigned to the 82nd Airborne Division. The 1st ABG, 503rd  Inf remained with the 82nd Airborne Division until 26 March 1963, when it was relieved from assignment to the 82nd and joined 2–503rd in its assignment to the 173rd Airborne Brigade. Shortly thereafter, on 25 June 1963, it was reorganized and redesignated as the 1st Battalion (Airborne), 503rd Infantry. Lineage and honors. Campaign participation credit. Note: The published Army lineage shows War on Terrorism "Campaigns to be determined". Comparison of the battalion's deployment dates with the War on Terrorism campaigns estimates that the battalion will be credited with participation in the six campaigns listed. Heraldry. Distinctive unit insignia. 503rd  Infantry Distinctive Unit Insignia Coat of arms. 503rd Infantry Coat of Arms