Czech Republic

 In Eastern Europe, Czechoslovakia split peacefully into two, with the Czechs and the Slovaks forming independent countries. But the most severe conflict took place in the Balkan republics of Yugoslavia. After 1991, it broke apart with several provinces like Croatia, Slovenia and Bosnia and Herzegovina declaring independence. Ethnic Serbs opposed this and a massacre of non-Serb Bosnians followed. The NATO intervention and the bombing of Yugoslavia followed the inter-ethnic civil war.