NATO (North Atlantic Treaty Organization) was the Earth's most powerful suprenational organization during the 21st and early 22nd centuries. It went through a series of expansions to respond to major changes in the global community.
Membership and Expansions[]
NATO was first founded in 1949. Its series of expansions are listed below.
Founding - 1949[]
Flags | Nations |
United States of America | |
Canada | |
United Kingdom | |
France | |
Iceland | |
Norway | |
Denmark | |
Italy | |
Portugal | |
Belgium | |
Luxembourg | |
![]() |
Netherlands |
First Expansion - 1952[]
Flags | Nations |
Turkey | |
Greece |
Second Expansion - 1955[]
Flags | Nations |
Germany |
Third Expansion - 1982[]
Flags | Nations |
Spain |
Fourth Expansion - 1999[]
Flags | Nations |
Czech Republic | |
Hungary | |
Poland |
Fifth Expansion - 2004[]
Flags | Nations |
Bulgaria | |
Estonia | |
Latvia | |
Lithuania | |
Romania | |
Slovakia | |
Slovenia |
Sixth Expansion - 2009[]
Flags | Nations |
Albania | |
Croatia |
Seventh Expansion - 2015[]
Flags | Nations |
Macedonia | |
Montenegro | |
Bosnia and Herzegovina |
Eight Expansion (Russian Crisis) - 2025[]
Flags | Nations |
Sweden | |
Finland | |
Moldova | |
Serbia | |
Ireland | |
Austria | |
Switzerland | |
Cyprus | |
San Marino | |
Andorra | |
Liechtenstein |