Before the Croats settled, the Roman provinces of Pannonia and Dalmatia were located in today's area, and only since the 9th century can we talk about the existence of Croatian sovereignty over this territory. In the 10th century, under the crown of King Tomislav, the Kingdom of Croatia was formed, which had the greatest extent during the reign of Petar Krešimir IV. The Croats lost their independence in the 12th century when they entered into a personal union with Hungary, and in the period from the 16th to the 18th century Croatia was between the Ottomans, the Venetians and the Habsburgs. Numerous conflicts against the Ottomans resulted in the smallest area of Croatian territory in history, "the remnants of the remnants of the once glorious Kingdom of Croatia". After the creation of the Austro-Hungarian Empire, its territory was divided into Austrian and Hungarian parts, and with the end of the First World War and the collapse of Austria-Hungary, several Yugoslav state communities were created, in which Croatia was first divided into six districts, and then into two banovinas. The reunification of Croatian territory happened in 1939 with the creation of the Banovina of Croatia, and Croatia gained its present form after the Second World War, within the Socialist Federal Republic of Yugoslavia.