 Complete the following phrase:  From 1526 to 1687 Syrmia was part of the Ottoman Empire within the Budin Eyalet. At the end of this period the Great Migrations of the Serbs occurred resulting in Serb settlement in the region which was at the time part of Habsburg Monarchy. Mirkovci was established in 18th century within the Slavonian Military Frontier, which acted as the cordon sanitaire against incursions from the Ottoman Empire in which Serb colonists were defending the Monarchy in return for land-grants and internal self-administration granted in Statuta Valachorum. Soldiers from Mirkovci fought in 