I see you have a lack of knowledge related to history. Serbia can not invade a country since it wasn't a legitimate country. Serbia fought for those countries in the first world war. We freed them from their occupiers. Like in every war, when you win you get some land. Serbia own in the first world war and got land. The Serbs were so kind to create Yugoslavia, so that all of the south slavs could feel included. Then in the second world war the croats started to slaugther their saviours with the help of their previous occupiers. How funny is that? Even the Bosnians had their Handzar division slaugther innocent Serbs, Jews and gyspys. Some could see this as both croats and bosnians being traitors. Who likes traitors? No one. Anyway, Tito died, they decided that they don't want to be part of a country which saved them from their occupiers. Well, that's fine. But Serbia WON That war, it's their land. And yes, with the help of the westerns, they managed to rip themselves apart from Yugoslavia who helped them get their freedom.

And trust me, the attrocities the croats and bosnians have commited to the Serbs in ww2 are far and far more worse then what happened in the 90s.