[color=#000000
ost_uid0]Yugoslavia = "Kingdom of the Slavs" (it [i
ost_uid0]was[/i
ost_uid0] briefly a kingdom following its establishment at the end of WWI, under King Zog, IIRC.)
It was assemblage of South Slavic groups with a lot of historical animosity towards each other. You may recall that a battle fought in 1364(?) was cited in reports on the fighting in Kosovo as a longtime sore point between the Albanians and other ethnic groups in the region. Basically, the different Slavic groups have not been getting along with each other since they moved into the area around year 400.
Communism actually served to keep things relatively quiet for most of the period between WWII and the late 1980s. With the collapse of the USSR and the fall of the Iron Curtain, the lid came off that particular pressure cooker.
Disclaimer: this may be an oversimplification, but I've got to go to work now.[/color
ost_uid0]