In the context of the end of WW2, Yugoslavia's President Josip Broz Tito carried out massive population transfers within the country modeling what happened in the rest of Europe like the 14 million Germans expelled from Eastern and Central Europe, the Hungarians from Romania and the Poles from the SSR's of Ukraine, Belarus and Lithuania.
By the time of the end of the Cold War, Yugoslavia's Republics of Slovenia, Croatia, Bosnia, Serbia, Montenegro, Kosovo and Macedonia all had an ethnic/national majority
Historians still debate the legacy of Tito's actions, even in this forums most of the stories end up in a dystopian ethnic-tensed Yugoslavia destroying itself.
But what if Tito had not carried out those actions good for some, despicable for others?