Austro-Hungarian rule in Bosnia and Herzegovina power over the Catholic Church in Bosnia and Herzegovina, the Emperor established the cathedral in Sarajevo and named Archbishop Dr. Josip Štadler as its head. Just before the occupation of Bosnia and Herzegovina, the Croatian Sabor asked the Emperor to alter the situation in Bosnia and Herzegovina so it could be unified with the Kingdom of Croatia-Slavonia and the Kingdom of Dalmatia. The Emperor refused to accept this demand and dismissed the Sabor. This was done as the Austrian-Hungarian authorities had a plan to isolate Bosnia and Herzegovina from its neighbouring Slavic countries, Croatia and Serbia, and to halt the
Croats of Bosnia and Herzegovina and Fojnica. Around 30% of the present-day territory of Bosnia and Herzegovina become part of Banovina of Croatia. Those parts had a Croatian majority. Creation of Banovina of Croatia was one of the solutions to the ""Croatian issue"". After the collapse of Yugoslavia amidst German and Italian invasion in April 1941, the Axis puppet state which encompassed the entire Bosnia and Herzegovina, Independent State of Croatia (NDH) under the radical Croat nationalist ustaša regime was established. Bosnian Croats were divided, as some supported NDH, some actively opposed it by joining or supporting the Yugoslav Partisans, while others chose to wait,