Lewis-McChord, Washington (organic elements concurrently activated). 3rd Battalion, 158th Aviation Regiment The 3rd Battalion was activated on 25 July 1968 in the regular army as Company C, 158th Aviation Battalion, an element of the 101st Airborne Division (airmobile), at Fort Riley, Kansas. It was inactivated 16 October 1986 at Fort Campbell, Kentucky and relieved from assignment to the 101st Airborne Division (air assault). The unit was redesignated 16 September 1987 as Headquarters and Headquarters Company, 3rd Battalion, 158th Aviation, but withdrawn from the regular army on 16 September 1988 and allotted to the army reserve at Glenview, Illinois, where it was inactivated and re-allotted to the regular army. The battalion was concurrently redesignated as Company C, 158th Aviation and activated in Germany. It was redesignated on 16 October 2000 as the 3d Battalion, 158th Aviation. As of mid-2001, a detachment from Foxtrot Company, 159th Aviation Regiment, was deployed to Camp Able Sentry, Macedonia, in support of KFOR and Operation Joint Guardian. Company D, 158th Aviation Regiment Company D was activated on 25 July 1968 in the regular army as Company D, 158th Aviation Battalion, an element of the 101st Airborne Division (airmobile), and activated at Fort Carson, Colorado. It was inactivated on 30 September 1981 at Fort Campbell, Kentucky, and relieved from assignment to the 101st Airborne Division (air assault), then redesignated on 16 September 1987 as Headquarters and Headquarters Company, 4th Battalion, 158th Aviation, relieved from allotment to the regular army, allotted to the army reserve, and activated at Fort Devens, Massachusetts (organic elements concurrently constituted and activated). It was inactivated there on 1 September 1996. Redesignated on 16 October 1997 as Company D, 158th Aviation, it was relieved from allotment to the army reserve, allotted to the regular army, and activated in Germany, where it was again inactivated on 15 October 2000. Nine days later it was relieved from allotment to the regular army, allotted again to the army reserve, and subsequently activated on 16 September 2002 at Victorville, California. 5th Battalion, 158th Aviation Regiment The 5th Battalion was reorganized and redesignated in 1987 as a parent regiment under the United States Army Regimental System. On 18 September 1987 at Giebelstadt Army Airfield (GAAF) in Giebelstadt, Germany, the lineage of Headquarters and Headquarters Company, 158th Aviation Battalion was reflagged as Headquarters and Headquarters Company, 5th Battalion, 158th Aviation, which was constituted and activated, using the assets of the