The
Venetian fleet led by Orseolo succeeded in taking over coastal towns from
Rab (
Arba) in the north to
Dubrovnik (
Ragusa) in the south, including islands of
Vis (
Issa),
Lastovo (
Lagosta) and
Korčula (
Curzola), either with using armed forces or calm surrender. The bloodiest conflict was the
battle of Lastovo in 1000, at the end of which the town of
Lastovo was completely destroyed and the survivors displaced. The Republic of Saint Mark secured its
suzerainty over the area until the 1030s, after which the Croatian King Stjepan I, having come to power, took control over the town of
Zadar. He and his son Petar Krešimir IV succeeded in taking other coastal towns back from Venetians. Since 1085 however, following the
Byzantine–Venetian Treaty of 1082, Venice subsequently conquered a large part of the Croatian coastal and maritime territory. made by
Andrea Vicentino In 1105 the new Croatian king,
Coloman of Hungary, launched campaign against Venetians, which was approved by Byzantine Emperor, and returned the northeastern Adriatic coast under the crown. Ten years later, Doge
Ordelafo Faliero managed to retake some of the disputed area: he conquered Zadar and several other towns but lost his life in a battle. A peace treaty was then concluded, according to which Zadar devolved upon Venice, while
Biograd,
Šibenik,
Trogir and
Split remained in the
Kingdom of Croatia in personal union with Hungary. A new Venetian military campaign was undertaken in 1125 and Doge
Domenico Michele's forces captured Split and Trogir. King
Béla II liberated these two towns in 1133, but until the end of the 12th century several further naval campaigns of Venice followed, so that the warfare was almost permanent. In 1180 King
Béla III managed to free Zadar and the whole area between the rivers
Krka and
Neretva. Since Venetians did not give up subjugating Zadar, another war between Venice and the town of Zadar (supported by the King) broke out and lasted twenty years (1183–1203), ending with the Crusaders' capture of the town.
Crusaders' capture of Zadar in 1202 The
Crusaders' capture of Zadar was a consequence of an agreement between the
crusaders and the Republic of Venice for transport across the sea, whose price far exceeded what the crusaders were able to pay. As a solution Venetians proposed that the crusaders help them capture Zadar, a constant battleground between Venice on one side and
Croatia and
Hungary on the other. Although many crusaders had refused to take part in the siege of the
catholic town, the attack started in November 1202. After fierce fighting, Zadar fell on 24 November and the Venetians and the crusaders
pillaged the town. After spending the winter in Zadar, the crusaders continued their campaign (
Fourth Crusade) in the first days of the springtime. In 1203,
Pope Innocent excommunicated the whole crusading army, along with the Venetians, for taking part in this attack, but Zadar remained under the control of Venice. ==Period between 1203 and 1358==