 Simultaneously, on the same date, Company A, 501PIR was reorganized and re-designated as Headquarters and Headquarters Company, 1st Airborne Battle Group, 501st Infantry, and remained assigned to the 101st Airborne Division (organic elements were concurrently constituted and activated).An element of the 501st actually served with the 82nd Airborne Division when the 82nd reconfigured in the pentomic format.On 1 September 1957, Company B, 501PIR was reorganized and re-designated as Headquarters and Headquarters Company, 2nd Airborne Battle Group, 501st Infantry as an organic element of the 82nd Airborne Division, and activated at Fort Bragg, NC (concurrently, organic elements constituted and activated at Fort Bragg).