NATO

Member countries of NATO: Albania (2009), *Belgium (1949), Bulgaria (2004), *Canada (1949), Croatia (2009), Czech Republic (1999), *Denmark (1949), Estonia (2004), *France (1949), Germany (1955), Greece (1952), Hungary (1999), *Iceland (1949), *Italy (1949), Latvia (2004), Lithuania (2004), *Luxembourg (1949), Montenegro (2017), *Netherlands (1949), North Macedonia (2020), *Norway (1949), Poland (1999), *Portugal (1949), Romania (2004), Slovakia (2004), Slovenia (2004), Spain (1982), Turkey (1952), the *United Kingdom (1949), and the *United States (1949). [*denotes founding member]

This makes 12 founding member countries of NATO: Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, the United Kingdom, and the United States.