ESTABLISHED APRIL 4, 1949 with 12 MEMBERS
Total terrain covered 27, 580, 492 km (10,648,887 sq mi)
FOUNDING MEMBERS: 1949
Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, United Kingdom, United States
1952: Greece & Turkey
1955: West Germany
1982: Spain
1990: Reunification of Germany
1999: Czech Republic, Hungary & Poland
2004: Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia, Slovenia,
2009: Albania & Croatia
2017: Montenegro
2020: North Macedonia
2023: Finland
2024: Sweden
ASPIRATIONAL MEMBERS:
Ukraine, Georgia, Bosnia and Herzegovina