 As the region became a point of contention between the Habsburgs, Ottomans, and Venetians, its defense was given high importance in the newly established Croatian Military Frontier, as exemplified by the Uskoks of Senj.After the Ottoman conquest of their original base in Klis, the Uskoks established a new headquarters in Nehaj Fortress as a bulwark against westward expansion by the Ottomans.They also launched raids against Christian communities under Ottoman rule and Venetian commerce and subjects.