Supreme Headquarters Allied Powers Europe was withdrawing from the NATO military structure. SHAPE and all the other NATO installations, including NATO Headquarters and Allied Forces Central Europe (AFCENT), were informed that they must leave French territory by April 1967. Belgium became the host nation for both NATO's political headquarters and SHAPE. General Lyman Lemnitzer, SACEUR at the time, had hoped that SHAPE could be located near to NATO Headquarters, as had been the case in Paris, but the Belgian authorities decided that SHAPE should be located at least 50 kilometres from Brussels, NATO's new location, because SHAPE was a major wartime military target. The Belgian
Exercise Longstep on a renewed urgency following the outbreak of the Korean War, prompting NATO to establish Supreme Headquarters Allied Powers Europe (SHAPE) under the command of General of the Army Dwight D. Eisenhower, U.S. Army, on 2 April 1951. Exercise Longstep was an early naval exercise for SHAPE's southern regional command, Allied Forces Southern Europe (AFSOUTH). The overall exercise commander for Grand Slam was Admiral Robert B. Carney USN, NATO's Commander-in-Chief Allied Forces Southern Europe (CINCSOUTH). AFSOUTH component commanders during Longstep were: The objective of the Allied ("Blue") forces was to dislodge enemy ("Green") invasion forces from their occupying positions in