The original members of the North Atlantic Treaty Organization known as NATO formed in 1949 during the Soviet blockade of Berlin, were:
Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom, and the United States.
Greece and Turkey joined NATO in 1952; the Federal Republic of Germany in 1953; and Spain in 1982.
The European Economic Community, or Common Market, was founded in 1958.
Its original members were: Belgium, France, the Federal Republic of Germany, Italy, Luxembourg, and the Netherlands.
Denmark, Ireland, and the United Kingdom joined in 1973; Greece in 1981; and Spain and Portugal in 1986.