Allied Command Transformation (ACT)
It is a military command of the North Atlantic Treaty Organization (NATO), formed in 2003 after restructuring. It was intended to lead the military transformation of alliance forces and capabilities, using new concepts such as the NATO Response Force and new doctrines in order to improve the military effectiveness of the alliance. When France rejoined the NATO Military Command Structure in mid-2009, a significant change took place, where the Supreme Allied Commander Transformation (SACT) became a French officer.
Allied Command Transformation was preceded by Allied Command Atlantic (ACLANT) established in 1952 under the overall command of Supreme Allied Commander Atlantic (SACLANT), with its headquarters at Norfolk, Virginia. ACLANT's purpose was to guard the sea lines of communication between North America and Europe in order to reinforce the European countries of NATO with U.S. troops and supplies in the event of a Soviet/Warsaw Pact invasion of Western Europe. Following the end of the Cold War, the Command was reduced, with many of its subordinate headquarters spread across the Atlantic area, losing their NATO status and funding. However, the basic structure remained in place until the Prague Summit in the Czech Republic in 2002. This led to ACLANT being decommissioned effective 19 June 2003 and a new Allied Command Transformation being established as its successor.