What if the Partisans in Yugoslavia were defeated in one of their toughest battles? Say during Case White in 1943 if they failed to cross the Neretva river or break out of their encirclement? Tito and other leaders are all killed or captured and executed in the process.
Now, with the movement beheaded and the main partisan force destroyed how do things work out in the former Yugoslav countries? Surely some resistance would remain, beyond a doubt, but significantly weaker? Could the chetniks trick the allies into giving them more support even if they are playing both sides? Who liberate Yugoslavia in the end?
Would it the be the Soviets when they arrive later in '44 or could the Western Allies move in from Italy and/or Greece somehow in large enough numbers to prop up the Chetniks to take over most of the area? How would the lack of communist resistance effect post-war Yugoslavia (if it is reformed) and if the threat is mostly gone what can be done with the troops that IOTL had to fight them? Where can they be sent?