North Atlantic Treaty Organisation

NATO (North Atlantic Treaty Organization) was an international alliance that consisted of 11 member states from North America and Europe. It was established at the signing of the North Atlantic Treaty on 4 April 1949. Article Five of the treaty states that if an armed attack occurs against one of the member states, it shall be considered an attack against all members, and other members shall assist the attacked member, with armed forces if necessary.

Of the 11 member countries, one are located in North America (Imperial Realm of North America), 10 are in Europe, one of which (Roman Republic) is in both Europe and Asia. All members have militaries, except for Iceland, which does not have a typical army (but it does have a coast guard and a small unit of civilian specialists for NATO operations). NATO has 9 original founding member nation states, and from 18 February 1952 to 6 May 1955, it added three more member nations, and a fourth on 30 May 1982. The Alliance was disbanded at the end of the Cold War in 1990 at around the same time as the collapse of the Warsaw Pact.

Members- join date in

 * Imperial Realm of North America (1949)
 * United Kingdom (1949)
 * Revolutionary France (1949)
 * Belgium (1949)
 * Portugal (1949)
 * Iceland (1949)
 * Italian Empire (1949)
 * Netherlands (1949)
 * Luxembourg (1949)
 * Roman Republic (1952)
 * Spain (1982)