@IWTH 
 *1) As I said, sabotage occurred and mentioning it is of course perfectly fine. 
 *2) So let me get this straight. As far as I can tell from the sources, the Venezia surrendered to the Chetniks (not "subjugated" or "taken control of"), but defected to the Partisans. The only source that explains why says this was due to Chetnik "failure to bring the division securely under their control". You think this is an "oversimplification" in your opinion, but do not explain why. Nor have you provided contradicting sources. I also do not see how the surrender of the Italian army counts as an "action by Mihailovic" in the first place.