In the beginning of the war JNA and VRS forces gained control of Serb majority areas that were proclaimed part of Herzeg-Bosnia. By late 1992 Herzeg-Bosnia lost Kupres, most of Bosnian Posavina, and Jajce to VRS. The territory under the authority of Herzeg-Bosnia became limited to Croat ethnic areas in around 16% of Bosnia and Herzegovina. The arrival of Bosniak refugees from areas captured by the VRS to HVO-controlled parts of central Bosnia and Mostar altered the ethnic structure and reduced the share of Croats.