or Prosigoj, fl. 819). In the mid 9th century, Vlastimir marries his daughter to Krajina, the son of Beloje, and gives him the Župa of Trebinje to govern under his suzerainty. The Belojević noble family is entitled the rule of Travunia; Hvalimir, and his son Čučimir continue the office under the Serbian crown. From 927 to 960, Časlav Klonimirović, the last of the Vlastimirović dynasty, held supreme rule of Travunia which at the time bordered Zahumlje to the west, the city of Ragusa or Dubrovnik to the southwest, Duklja to the south and Serbia (crownland, see Rascia) to the north. Its coastline spanned from Dubrovnik to Boka Kotorska. With the death of Časlav, Serbia disintegrated and Duklja absorbed most of Rascia along with Zahumlje and Trebinje. The Catepanate of Ras was established during the rule of John Tzimiskes (r. 969–976). A seal of a strategos of Ras has been dated to Tzimiskes' reign, making it possible for Tzimiskes' predecessor Nikephoros II Phokas to have enjoyed recognition in Rascia.Paul Magdalino, Byzantium in the year 1000, p. 122 In the 990s, Bulgarian Tsar Samuel made client states out of most of the Balkans, including Duklja and Zahumlje. In 998, Samuel launched a major campaign against Jovan Vladimir to prevent a Byzantine-Serbian alliance. When his troops reached Duklja, Vladimir withdrew to the mountains, Samuel left part of the army at the foot of the mountains and led the remaining soldiers to besiege the coastal fortress of Ulcinj. In an effort to prevent bloodshed, he asked Jovan Vladimir to surrender, but Jovan refused, some Serb nobles offered their services to the Bulgarians and, when it became clear that further resistance was fruitless, the Serbs surrendered. Jovan Vladimir was exiled to Samuel's palaces in Prespa. The Bulgarian troops proceeded to pass through Dalmatia, taking control of Kotor and journeying to Dubrovnik. Although they failed to take Dubrovnik, they devastated the surrounding villages. The Bulgarian army then attacked Croatia in support of the rebel princes Krešimir III and Gojslav and advanced northwest as far as Split, Trogir and Zadar, then northeast through Bosnia and Raška and returned to Bulgaria. The dawn of the 10th century brought a short-lived Bulgarian occupation after the fall of the Rascian lands, but prince Caslav restored a Principality of Serbia by 931 and ruled Travunia as well. Travunia flourished under the greatest Serbian early medieval ruler – Saint Jovan Vladimir of