Sir Ryan DiAsio, KWCGASD

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Collective defence and Article 5

On 4 April 1949, 12 countries from Europe and North America came together in Washington, D.C. to sign the North Atlantic Treaty. NATO’s founding treaty is not long – only 14 articles, just over 1,000 words – and its core purpose is clear and simple: a joint pledge by each country to assist the others if they come under attack.