Belgium is one of the twelve founding members of NATO

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Belgium is one of the twelve founding members of NATO

Background

Belgium's defence commitments sit behind today's Belgian budget story, and its oldest such commitment is to the Atlantic Alliance.
NATO records that the North Atlantic Treaty was signed on 4 April 1949 in Washington, D.C.
NATO's founding member countries were Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom and the United States.
Belgium is therefore an original signatory, not a later entrant.
All three Benelux countries, Belgium, the Netherlands and Luxembourg, are founding members.
Belgium went on to host the Alliance's headquarters in Brussels.

Treaty signed: 4 April 1949 Place of signature: Washington, D.C. Founding members: 12

Why it matters for exams: The list of NATO's twelve founding members and the 1949 treaty date are classic objective questions.

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2 October 2026 Source: NATO

In plain words

North Atlantic Treaty The founding treaty of NATO — Also called the Washington Treaty.

Benelux Belgium, the Netherlands and Luxembourg — A customs and economic union of the three neighbouring states.