Took me a second to figure that one out...Socialist Federal Republic of Yugoslavia. A country that doesn't even exist anymore
Interestingly, Serbia and Montenegro were still known as the "Federal Republic of Yugoslavia" up until 2003.
Belgrade did not give up on keeping Yugoslavia together quickly or easily. Croatia still holds animosity towards Montenegro and Serbia from being bombed and invaded during the war. Notable currency facts: Montenegro is not a part of the EU but uses the Euro while Croatia is a part of the EU and uses the kuna.