Shelby, Mississippi, the 28th Infantry Division was reorganized on 20 November 1946 and returned to the Pennsylvania Army National Guard, with its headquarters established at Harrisburg. Among the units formed after the end of World War II reorganization of the National Guard was the 628th Tank Battalion. Following the outbreak of the Korean War, several Pennsylvania units saw active service there. Meanwhile, the 28th Division was ordered into active federal service 5 September 1950 at Harrisburg. The Division re-opened the mothballed Camp Atterbury, Indiana and remained there from 13 September 1950 to 23 November 1951. It was sent to Germany to augment NATO forces in Germany. During the Korean War, the 28th was mobilized and deployed to Europe as a part of the NATO command defending Western Europe from the threat of Soviet attack and remained on federal service until 22 May 1954. In June 1959 the Pennsylvania Army National Guard was extensively reorganized in line with the Pentomic (ROCID) organization then coming into force. At that time, a number of separate Tank and Field Artillery Battalions which had served through World Wars I and II were reorganized as regiments. Thus the 103rd Armor Regiment (constituted 1 June 1959, partially from the 628th Tank Bn), 107th Field Artillery Regiment, the 108th Field Artillery Regiment, the 109th Field Artillery Regiment, the es)|166th Field Artillery Regiment, the 229th Field Artillery Regiment (United States), and the 28th Aviation Company were established or re-established. From 1959 to 1974, the 176th Air Defense Artillery Regiment was part of the force. 1-176 and 2-176 were part of the 218 AG(AD) from 1 June 1959 to 1 Apr 1963, after which the 2-176 joined the 213th Artillery Group (Air Defense) until 17 February 1968, and thereafter until 1974 just with the PA ARNG. In 1972, widespread flooding in the aftermath of Hurricane Agnes resulted in 45 deaths and $3 billion in property damage. Nearly 13,000 Army and Air Guard members were called to state active duty to help with relief operations. In 1987-1988 Army National Guard aviation units were converted into regiments, and thus the 104th Aviation Regiment was formed in Pennsylvania. The regiment traced its history to the activation of an aviation company for the 28th Infantry Division in 1959. In August 1989, the 165th Military Police Battalion was reorganized as the 1st Battalion, 213th Air Defense Artillery Regiment. Two years earlier, the 165th MP Bn