NATO:
1. USA
2. Canada
3. UK
4. France
5. Spain
6. Portugal
7. Belgium
8. Netherlands
9. Norway
10. Germany
11. Denmark
12. Italy
13. Greece
14. Turkey
New members after fall of Berlin Wall:
15. Poland
16. Latvia
17. Lithuania
18. Estonia
19. Croatia
20. Romania
21. Hungary
I’m not sure about Slovenia, Bosnia-Herzegovina, Montenegro or Albania but I think so.
So it is a lot more than 10.
I was thinking more in terms of the European Union.
The ten nation confederacy does not need to be NATO. It could be something else.
What about Transylvania?