Hungary entered NATO with Poland and Czechia, the first Warsaw Pact states to join the alliance
Background
Hungary joined the North Atlantic Treaty Organization on 12 March 1999, on the same day as Poland and Czechia.
NATO records that these three became the first former members of the Warsaw Pact to join the alliance.
NATO was founded in 1949 with 12 member states and now has 32 member countries.
The alliance has gone through 10 rounds of enlargement since its founding.
Finland joined in 2023 and Sweden in 2024, the most recent accessions.
Hungary joined NATO:
12 March 1999
Joined on the same day:
Poland and Czechia
NATO members today:
32
Founding members:
12
Why it matters for exams: NATO membership rounds are a standing objective-question topic, and Hungary is a textbook example of a Warsaw Pact state that crossed over.
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In plain words
Warsaw Pact Warsaw Treaty Organization — The Soviet-led military alliance of Eastern European states during the Cold War.