Vukan was the first-born of
Petrislav, the son of King
Mihailo I and his second Greek wife. He and his brother Marko swore an oath of loyalty to
Constantine Bodin and took power as his
vassals in
Serbia in 1083 or 1084. Civil war broke out in the realm among Bodin's relatives, greatly weakening Duklja, and giving the chance for inner Serbia to assert itself and break away. Inner Serbia gradually replaced Duklja as the main opponent of Byzantine rule in the 12th century. On 29 April 1091, the
Byzantines destroyed the Pecheneg force. Following Bodin's death in 1101, Bodin's half-brother
Dobroslav II succeeded him as king of
Duklja.
Kočopar Branislavljević, Bodin's first cousin once removed, travelled from
Dyrrhachium to Serbia, forging an alliance with Vukan. This alliance would prove worthy in their successful invasion of Duklja in 1102. The battle that ensued at the
Morača led to the overthrow of Dobroslav II and the coronation of Kočopar to the throne. Dobroslav was subsequently banished to Serbia. However, Kočopar's reign was short-lived as well as Vukan had been planning to install Bodin's nephew,
Vladimir to the throne of Duklja. Kočopar, having lost influence among the
Zachlumoi, married the daughter of a Zachlumian (Bosnian) prince (
knez). However, in the Chronicle of the Priest of Duklja, the chronicler specifically mentioned that at the time, Zachlumia was ruled by a
ban, not a knez. Kočopar later died in battle against the Zachlumoi. Upon his death, Vukan installed Bodin's nephew Vladimir as planned, to whom he gave his daughter as a wife and so strengthened ties between Serbia and Duklja. A mere pawn in dynastic conflicts, Vladimir was poisoned in 1118 under orders from
Queen Jaquinta, widow of his late uncle, Constantine Bodin. Jaquinta then appointed her son,
George, to the throne of Duklja. Upon spreading his influence in Duklja, Vukan invaded Byzantium once more in the spring of 1106. He was probably attempting to take advantage of the
Norman campaign against the Byzantines (see
Byzantine–Norman wars). In a battle, he defeated
John Komnenos again. The war was concluded by November of that year, with Vukan being forced to send hostages once again to emperor Alexios I in return for peace. There is no written record of Vukan after this war. Scholars believe Vukan died after 1112. Vukan's successor was
Uroš I his nephew through Marko. ==Notes==