In World War II, there was a group in Yugoslavia called the Slovene White Guard. Concerning this group, the book If The Allies Had Fallen states that:
If an Istrian landing was put into effect, the Slovene White Guard (Domobranstvo) would almost certainly have tried to join the allied side.
From what I understand (and from what I can understand on the Internet), they were a collection of anti-Communist collaborationist political groups whose leaders set up the Slovenian Alliance to fight Communism and their local partisans. However, this apparently was just for show, as from what I read, the leaders of this Alliance and of the White Guard secretly swore allegiance to the government-in-exile while putting on a show of allegiance to the Germans.
I’m still unsure of what their story is though, as I can’t seem to understand most of the online sources on them. Why did they agree with the Allies? And were they waiting for an Istrian invasion to switch sides?
If The Allies Had Fallen is sort of a niche book. It’s edited by Dennis Showalter and Harold Deutsch, published by MJF Books. ISBN: 978-1-60671-238-2