With Bosnia's demographic structure comprising a population of Serbs and Croats making close to 50%, and with ideas on independence resting with the ethnicities rather than the nation on the whole, control of territory once again became open to interpretation, with large sections of Bosnia, Croatia and Serbia under dispute as to its proper ownership. The most important elements which fostered the discord are the formation of the Kingdom of Yugoslavia, the civil war and genocide (see Jasenovac concentration camp) by the Independent State of Croatia during the Second World War, the overreaching idea of "Greater Serbia", and the Balkan adaptations of Pan-Slavism.