 On the other side, the Croatian Parliament met in Cetin and chose Ferdinand I of the House of Habsburg as new ruler of Croatia, under the condition that he provide protection to Croatia against the Ottoman Empire while respecting its political rights.A few years later both crown would be again united in Habsburgs hands and the union would be restored.The Ottoman Empire further expanded in the 16th century to include most of Slavonia, western Bosnia (then called Turkish Croatia) and Lika.