Here is a comprehensive list of countries that have announced partial or full UFO disclosure:

1. Argentina
2. Australia
3. Brazil
4. Canada
5. China
6. Denmark
7. Finland
8. France
9.India
10. Ireland
11. Japan
12. Mexico
13. New Zealand
14. Peru
15. Russia
16. Spain
17. Sweden
18. Ukraine (not in English)
19. United Nations
20. United Kingdom
21. Uruguay
22. Vatican City

Enjoy!