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
Agreement on Friendship and Cooperation between Bosnia and Herzegovina and Croatia Community of Herzeg-Bosnia (HZ-HB) was established, it claimed it had no secessionary goal and that it would serve a "legal basis for local self-administration". It vowed to respect the Bosnian government under the condition that Bosnia and Herzegovina was independent of "the former and every kind of future Yugoslavia." In December, Tuđman, in a conversation with Bosnian Croat leaders, said that "from the perspective of sovereignty, Bosnia-Herzegovina has no prospects" and recommended that Croatian policy "support for the sovereignty [of Bosnia and Herzegovina] until such time as it no longer suits Croatia." In April 1992, the siege of Sarajevo began,