 The island became a part of the realm in 1481, but Venice never captured the region's mainland, which would have entirely linked Venetian possessions in the eastern Adriatic.Ottoman conquests led to the Battle of Krbava field (1493) and the Battle of Mohács (1526), both decisive Ottoman victories, the latter of which caused a succession crisis in the Kingdom of Hungary.In the 1527 election in Cetin, Ferdinand I of Habsburg was chosen as the new ruler of Croatia, under the condition that he provide protection to Croatia against the Ottoman Empire, which had extended as far as Lika in the immediate hinterland of the region since 1522.