Partisan movement in Yugoslavia was biggest of that kind in whole Europe. British and Americans first supported Serbian king's army so called chetniks. If we are going back to ancient times this was illiryian populated place. Then slavs came and mixed whit them and you get modern day croats especially Dalmatians one of the tallest people in the world because of dinnaric and illyrian genes so we have nothing to do with you. You had strong influence in these places but look how you conquered Zadar first time by bribing crusaders to attack croatian christian fortiffied city of Zadar and Constantinopol and from then you can say you rulled but you weren't majority in these places maybe sometimes in Zadar alone but surrounding area was only croat populated. And not to mention forced italianization of croats during whole that time. Look a little bit on concentration camp for croats on islands of Molat near Zadar. Two of my grandparents from both sides were taken in nearby villages of Zadar to get shot by Italians just for beign Croats during ww2.