Which among the following countries is not a member of the North Atlantic Treaty Organization (NATO)?

Correct — C, Belarus. The question asks which country is outside NATO, so the answer is the one that never joined, and Belarus is the odd one out on the list by a wide margin. It has stayed inside the Russian security orbit throughout — it is a member of the Collective Security Treaty Organization, the grouping led by Russia, and it is joined to Russia in the Union State. The other three are all members of long standing. Turkey joined in 1952, in the first enlargement after the alliance was founded. Hungary and Poland both joined on 12 March 1999, in the first round of enlargement into central Europe after the Cold War, together with the Czech Republic.

• (a)Hungary — Hungary is a member. It joined in March 1999, in the same round as Poland and the Czech Republic, a decade after leaving the Warsaw Pact.
• (b)Poland — Poland is a member, admitted in the same March 1999 round, and is one of the alliance's most active eastern members.
• (d)Turkey — Turkey is one of the older members, admitted in February 1952 along with Greece, and it controls the Turkish Straits, which is part of why it was brought in early.

NATO was created by the North Atlantic Treaty signed in Washington on 4 April 1949 by twelve founding states, with its core commitment in Article 5 — an armed attack on one member is treated as an attack on all. Its headquarters are in Brussels, and the North Atlantic Council is its principal decision-making body. Enlargement has been continuous rather than a single event, running from Greece and Turkey in 1952 through the central European rounds after 1999 to the Nordic accessions of this decade.

The reliable method for a membership question is to sort the list by history rather than by geography, because plenty of NATO members are further east than people assume. Hungary and Poland were Warsaw Pact states that changed sides after 1989, and both are inside. Belarus took the opposite path and stayed aligned with Moscow, which is what places it outside. Turkey is a reminder that the alliance was never confined to western Europe. Anchoring to the 2022 exam, this was asked in a year when the alliance was very much in the news because of the war in Ukraine, and the position has moved since: Finland joined on 4 April 2023 and Sweden on 7 March 2024, taking the membership to thirty-two. Belarus remains outside.

• NATO was founded by the North Atlantic Treaty of 4 April 1949; its headquarters are in Brussels.
• Article 5 provides that an armed attack on one member shall be considered an attack on them all.
• Greece and Turkey joined in 1952; Hungary, Poland and the Czech Republic joined on 12 March 1999.
• Belarus is not a member; it belongs to the Collective Security Treaty Organization and to the Union State with Russia.
• Finland joined in April 2023 and Sweden in March 2024, bringing the membership to thirty-two.

• Assuming a former Warsaw Pact state cannot be in NATO. Hungary and Poland both are.
• Excluding Turkey because it lies mostly outside Europe. It has been a member since 1952.
• Confusing NATO membership with membership of the European Union. The two lists overlap but are not the same.

As a which-country-is-not-a-member item, as a question on the founding year or on Article 5, or through a recent accession.

• practice — not a real PYQ

  The provision that an armed attack against one NATO member is considered an attack against all is contained in

  • (a)Article 2
  • (b)Article 4
  • (c)Article 5
  • (d)Article 10

  Answer(c) Article 5 — the collective defence clause of the North Atlantic Treaty of 1949.

• practice — not a real PYQ

  Belarus is a member of which of the following security groupings?

  • (a)NATO
  • (b)Collective Security Treaty Organization
  • (c)European Union
  • (d)Quad

  Answer(b) Collective Security Treaty Organization — the Russia-led grouping; Belarus has never been a NATO member.