Which of the following groups were vying for control of bosnia

In the 1920s, a rebellion arose on the republic of Bosnia and Herzegovina which led by the muslim rebels from Bosnia. These rebels were supported by the croatia and Serbian soldiers, and in order to put this war to an end, Bosnia asked for back up from washington , I hope that this helps out,, it was the best i could do because of the lack of info in your questtion!! Have a great day

                     ~razerthebrainieace