and maintenance personnel and some of its support people were loaned to other SAC units engaged in combat operations in the Far East and Southeast Asia. It was one of 11 SAC bomb wings that rotated such combat duty under the program known as Arc Light. By 1969, Intercontinental ballistic missiles (ICBM) had been deployed and become operational as part of the United States' strategic triad, and the need for B-52s had been reduced. In addition, funds were also needed to cover the costs of combat operations in Indochina. The 70th Bombardment Wing was inactivated 31 December 1969, and its aircraft were reassigned to other SAC units. As part of the inactivation, Clinton-Sherman AFB was closed. Modern era The wing was redesignated the 70th Air Base Group and operated and maintained Brooks Air Force Base, Texas from October 1994 until that installation's BRAC-directed closure in September 2011. It supported the Human Systems Center until October 1998, when the Center was redesignated as the 311th Human Systems Wing. The group's mission, personnel, and equipment were all transferred to the 311th Air Base Group. In August 2000, the unit was activated as the 70th Intelligence Wing, then later the 70th Intelligence, Surveillance, and Reconnaissance Wing, and has managed the USAF portion of the DoD's cryptology mission, exploiting intelligence, integrating it into air and space operations, and assisting commanders and others with intelligence requirements. The wing's 544th Intelligence, Surveillance and Reconnaissance Group inactivated on 24 July 2020 when it became Space Delta 7 of the US Space Force. Lineage 70th Group Constituted as 70th Observation Group on 1 September 1941 Activated on 13 September 1941 Redesignated 70th Reconnaissance Group on 2 April 1943 Redesignated 70th Tactical Reconnaissance Group on 11 August 1943 Disbanded on 30 November 1943 Reconstituted and redesignated 70th Reconnaissance Group on 10 March 1947 Activated in the Reserve on 26 April 1947 Inactivated on 27 June 1949 Consolidated with the 70th Strategic Reconnaissance Wing on 31 January 1984 as the 70th Strategic Reconnaissance Wing 70th Wing Constituted as 70th Strategic Reconnaissance Wing on 23 March 1953 Activated on 24 January 1955 Redesignated 70th Bombardment Wing, Medium on 25 October 1961 Discontinued and inactivated on 25 June 1962 Redesignated: 70th Bombardment Wing, Heavy' and activated 15 November 1962 (not organized) Organized on 1 February 1963 Inactivated on 31 December 1969 Consolidated with the 70th Reconnaissance Group on 31 January 1984 (remained