ACBVASS / NMCHRM / PBJOV
each CAPITAL letter is a capitals capital letter.
1) To work out the 3 hidden countries you will need to find the country of each capital city.
2) When you have the 3 countries, give the 3 capitals of the 3 countries, the magic letter is 'B'
Answer in Comments Section below:
If not solved by 11th Sept. ............. little hint given.
'overtired'....... I am amazed you got the challenge so quickly. I really thought this one would keep you jetpunkers thinking for a while.... Congratulations and your 7th Challenge solve. Your Honorary Gold Medal is on it's way.
BTW:...... Athens / Cairo / Bucharest / Valletta / Algiers / Skopje / San'a ............. gives Greece / Egypt / Romania / Malta / Algeria / North Macedonia / Yemen ......... and these Initials give GERMANY. so on for Brazil and China.