North Atlantic Treaty Organization (NATO)

  1. (from 1949 )Belgium
  2. (from 1949 )Canada
  3. (from 1949 )Denmark
  4. (from 1949 )France
  5. (from 1949 )Iceland
  6. (from 1949 )Italy
  7. (from 1949 )Luxembourg
  8. (from 1949 )Netherlands
  9. (from 1949 )Norway
  10. (from 1949 )Portugal
  11. (from 1949 )United Kingdom
  12. (from 1949 )United States
  13. (from 1952 )Greece
  14. (from 1952 )Turkey
  15. (from 1955 )Germany
  16. (from 1982 )Spain
  17. (from 1999 )Czech Republic
  18. (from 1999 )Hungary
  19. (from 1999 )Poland
  20. (from 2004 )Bulgaria
  21. (from 2004 )Estonia
  22. (from 2004 )Latvia
  23. (from 2004 )Lithuania
  24. (from 2004 )Romania
  25. (from 2004 )Slovakia
  26. (from 2004 )Slovenia