- Lithuania
- Luxembourg
- Montenegro
- China
See Details
NATO was founded on 4 April 1949, the foreign ministers from 12 countries signed the North Atlantic Treaty (also known as the Washington Treaty) at the Departmental Auditorium in Washington, D.C. Currently there are 32 member countries of NATA:-
| Albania 2009 | Belgium 1949 | Bulgaria 2004 | Canada 1949 | Croatia 2009 |
| Czechia 1999 | Denmark 1949 | Estonia 2004 | Finland 2023 | 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 | Sweden 2024 | Turkiye 1952 |
| United Kingdom 1949 | United States 1949 |