 Complete the following phrase:  The membership of the organization was then largely static. In 1974, as a consequence of the Turkish invasion of Cyprus, Greece withdrew its forces from NATOs military command structure but, with Turkish co-operation, was readmitted in 1980. The Falklands War between the United Kingdom and Argentina did not result in NATO involvement because Article 6 of the North Atlantic Treaty specifies that collective self-defense is applicable only to attacks on member state territories north of the Tropic of Cancer. On 30 May 1982, NATO gained a new member when the newly-democratic Spain joined the alliance, as was confirmed by 