On 26 December 1991, Serbia, Montenegro, and the Serb rebel-held territory in Croatia (Serb Krajina) agreed that they would form a new "third Yugoslavia".[3] Efforts were also made in 1991 to include Bosnia and Herzegovina within the federation, with negotiations between Milošević, Bosnia's Serbian Democratic Party, and the Bosniak proponent of union – Bosnia's Vice-President Adil Zulfikarpašić taking place on this matter.[4] Zulfikarpašić believed that Bosnia could benefit from attempting to forge a union with Serbia, Montenegro, and Krajina; and promoted a compromise between the Serbs and Bosniaks, in which Serb Krajina and Bosniak Sanjak from Serbia would be annexed into a Greater Bosnia that within a union with Serbia and Montenegro, would secure both the unity of Serbs and Bosniaks.[4] Zulfikarpašić's proposition opposed any cantonization of Bosnia.[4] The Bosnian Serbs did not include Zulfikarpašić's proposition alongside their propositions.[4] However Milosević continued negotiations with Zulfikarpašić to include Bosnia within a new Yugoslavia.[4] Efforts to include the whole of Bosnia within a new Yugoslavia effectively terminated by late 1991 as Izetbegović planned to hold a referendum on independence while the Bosnian Serbs and Bosnian Croats formed autonomous territories.[5]