Special Operations Command Europe) for special operations missions. In 1961, EUCOM began operating an airborne command post, Operation Silk Purse. 1960s During the 1961 Berlin Crisis, on 25 August 1961, the Department of Defense announced 148,000 reserve personnel would be called on 1 October for twelve months of active duty service. 27,000 of these would be from Air Force Reserve and Air National Guard flying squadrons and support units to augment the Air Force, and 112,000 were U.S. Army Reserve. Many Army Reservists were sent to Europe to bring ground combat units up to full strength. Civil war broke out in Lebanon in 1958 due to mounting religious and political conflicts (see "1958 Lebanon crisis"). EUCOM conducted a major contingency operation, Operation Blue Bat, in response to Lebanon's request to restore stability within the government. In 1966, following disagreements by the French with certain NATO military policies, President Charles de Gaulle stated that all forces within France's borders would have to come under French control by April 1969. Soon afterward, France announced that SHAPE and its subordinate headquarters must leave French territory by April 1967. The following year, SHAPE moved to Mons, Belgium, while Headquarters EUCOM moved to Patch Barracks in Stuttgart, Germany. Headquarters Seventh Army moved to Heidelberg, where it merged with Headquarters United States Army, Europe. At Patch Barracks, EUCOM renovated the buildings, built a new operations center, and modernized communications infrastructure. EUCOM continued to prepare for the defense of Europe and began a series of annual REFORGER (Return of Forces to Germany) exercises in 1967. Cold War crises continued, including the 1968 Warsaw Pact invasion of Czechoslovakia. But, because of the Vietnam War, the number of the American forces in Europe slowly declined. Troop strength in Europe fell to 265,000 by 1970. 1970s During the 1970s, force protection concerns in Europe increased as terrorist groups, such as the Red Army Faction and the Red Brigades, targeted American facilities and personnel with bombings, kidnapping and assassinations. Palestinian terrorist organizations conducted terror operations in Europe, such as the kidnapping of Israeli athletes during the 1972 Summer Olympics in Munich. EUCOM and its components continued to provide military assistance throughout Europe, as well as humanitarian assistance, disaster relief, noncombatant evacuation, support to peacekeeping operations, and other non-traditional missions in Europe, Africa and the Middle East. For example, after the Congo became independent in 1960, EUCOM joined in several multinational operations