On 16 June 1966, following the French Government’s decision to withdraw its forces from the military structure of the North Atlantic Treaty Organisation (NATO), the Assembly of Western European Union (WEU) adopts Recommendation 137 on the state of European security, France and NATO, in which it particularly asks the WEU Council to seek assurance from France that the French forces currently stationed in Western Germany would be placed under the command of SACEUR in the event of aggression. The Assembly also asks whether all the WEU Member States still regard themselves as unreservedly committed to fulfil the obligation contained in Article V of the modified Brussels Treaty, namely the principle of mutual assistance in the event of aggression.