During these three months, the Yugoslav Army completed its pull-out from Slovenia, but in Croatia, a bloody war broke out in the autumn of 1991. Ethnic Serbs, who had created their own state Republic of Serbian Krajina in heavily Serb-populated regions resisted the police forces of the Republic of Croatia who were trying to bring that breakaway region back under Croatian jurisdiction. In some strategic places, the Yugoslav Army acted as a buffer zone; in most others it was protecting or aiding Serbs with resources and even manpower in their confrontation with the new Croatian army and their police force.