Yugoslavia, like most other Eastern European nations, was a collection of tribes brought together using the mighty Communist USSR force and not voluntary agreements and goodwill.

After the end of the cold war and the ensuing new world order of democracy, transparency and accountability, referendums were held across the communist world to determine the fate of USSR, Yugoslavia and Czechoslovakia.

There was an overwhelming vote to end these forced unities. Yugoslavia disintegrated into tribal enclaves as shown: Croatia, Slovenia, Bosnia and Herzegovina, Serbia, Kosovo, Montenegro, Macedonia resulting in the so-called Balkan wars.

The same fate befell USSR. That's how we got Russia, Ukraine, Georgia, etc. East Germany merged with then West Germany to form one Germany.