After the Berlin Wall fell in October 1989, presaging the demise of the Soviet Union, the Air Force reshuffled its organizations and resources to meet a shifting, diminishing, threat. On 3 January 1990, SAC re-designated the 812th Combat Support Group as the 812th Strategic Support Wing (812 SSW), which, for a short time, became Ellsworth's fourth wing. The 812 SSW consolidated all combat support activities into one organization. On 31 July 1990, SAC replaced the 12th Air Division with the Strategic Warfare Center (SWC), which provided operational command and administrative control over Ellsworth's subordinate units. Then, as part of SAC's intermediate headquarters and base-level reorganization plan, on 1 September 1991, SAC renamed the 28 BMW the 28th Wing (28 WG), the 44 SMW the 44th Wing (44 WG) and the 99 SWW the 99th Tactics and Training Wing (99 TTW). Ten days later, SAC inactivated both the SWC and the 812 SSW. Once again, the 28th became Ellsworth's host organization and it soon absorbed all previous 812 SSW functions. It was also during this period that, in acknowledgment of the elimination of the Warsaw Pact, that the President, via the Secretary of Defense, ordered all strategic nuclear alert operations to stand-down. The decades-long Cold War was over.