France leaves NATO's integrated military command (1966)
President Charles de Gaulle pulled France out of NATO's integrated military command structure, demanding that the roughly 26,000 U.S. troops stationed in France leave within a year. NATO's military headquarters relocated from Paris to Brussels.
U.S. forces relocated to Germany and Belgium; alliance command structure was rebuilt around a new center of gravity.
France remained a NATO political member and rejoined the integrated command in 2009, but the alliance's military architecture was reshaped for four decades.
Shows that ally friction can produce major posture changes without ending the alliance—and that the operational center of NATO can shift quickly when one member acts unilaterally.
