The fall of Bosnia to the Ottomans in 1463 resulted in increasing pressure on Croatian borders and continual losses of the territory, little by little moving the border line to the west. Permanent warfare during the Hundred Years' Croatian–Ottoman War (1493–1593) drastically reduced Croatian population in affected southeastern regions. Until the end of the 16th century the whole area of Turkish Croatia was occupied by the sultanate. The remaining Croats were converted to Islam and recruited as devşirme ("blood tax"). A part of the Croatian population managed to flee though, settling down in the northwestern regions of the country or abroad, in the neighbouring Hungary or Austria.