After the withdrawal of the Soviet Union from the Allied Control Council and the start of the Berlin Crisis in 1961, units from the other three countries were ordered to protect West Berlin against Soviet troops and against the GDR's own National People's Army (NVA) troops, since the Federal Republic of Germany was not allowed to station Bundeswehr units in Berlin. The French Army first stationed troops in Berlin in 1947. Their headquarters were called Quartier Napoléon.