Yugoslavia is a country
An old model or guideline was retired in favor of a new one.
TaughtYugoslavia is a single federal country on the Balkan peninsula, capital Belgrade.
NowIt broke apart across two decades of conflict into seven states: Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, North Macedonia, and Kosovo, the last of which declared independence in 2008 and is not universally recognized.
What actually happened
This was the opposite of the Velvet Divorce. Slovenia and Croatia declared independence in 1991, Bosnia in 1992, and the wars that followed were the deadliest in Europe since 1945, including the siege of Sarajevo and the Srebrenica genocide.
The fragmentation continued long after the fighting: Montenegro voted to separate from Serbia in 2006, and Kosovo declared independence in 2008. Kosovo's status remains genuinely unresolved. It is recognized by roughly 100 UN member states and not by Serbia, Russia, China, or five EU members, which is why it appears differently on maps published in different countries. Two of the successor states have also since changed names on the map: Macedonia became North Macedonia in 2019 under an agreement with Greece.
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Who was taught this
Still standard through 1992, so anyone who finished school between 1950 and 2008 learned the earlier version.