How did the Ottoman conquests change Croatia’s territory?

The Ottoman conquests in the 16th century significantly altered Croatia’s territory, leading to a gradual shift of the country's center north and west as its lands were eroded.1

The impact of these conquests included:

• Territorial Loss: Large portions of Croatian territory were occupied by the Ottoman Empire, forcing the Croatian nobility to maintain claims to these lands with the hope of future liberation.1
• Creation of the Military Frontier: To defend the "remnant of the remnants" of Croatia, the Habsburgs established the Military Frontier (Vojna Krajina) along the border with Ottoman-controlled lands.1
• Administrative Changes: Because the Military Frontier was governed directly by the Habsburg war council, it further reduced the land and authority under the control of the Croatian ban and the Sabor.1
• Demographic Shifts: The establishment of the Military Frontier and the resulting land rights attracted an influx of Serb populations from Ottoman-conquered territories, which formed the basis of Croatia’s minority Serb population.1