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12 countries meet in Washington DC and sign the North Atlantic Treaty. -
Greece and Turkey are welcomed into NATO, making the nation count 14. -
Greece becomes a member of NATO -
Turkey Joins NATO -
Germany joins NATO -
The Soviet Union and 7 nations create their own treaty after being rejected from NATO. -
NATO opens up headquarters in Brussels, Belgium
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Spain becomes a member of NATO -
Czechia joins NATO -
Hungary is admitted into NATO -
Poland joins NATO -
Bulgaria joins NATO -
Estonia is admitted into NATO -
Latvia joins NATO -
Slovakia joins NATO -
Solvenia is admitted into NATO -
Albania is admitted into NATO -
Croatia is welcomed into NATO -
Montengro joins NATO -
North Macedonia is admitted into NATO
