Jovan Vladimir ruled Duklja during the war between Byzantine Emperor Basil II and Samuel. Vladimir allegedly retreated into Koplik when Samuel invaded Duklja, and was subsequently forced to accept Bulgarian vassalage. Vladimir was later slewn by the Bulgars, and received a cult; "Shingjon" (the feast of St. Jovan Vladimir), which is celebrated by the Albanian Orthodox Christians. In 1018 Basil II conquered most of the Balkans and established the Archbishopric of Ohrid for the South Slavs. In the 1030s, Stefan Vojislav expelled the last "strategos" and defeated the Byzantines (1042), then set up Shkodër (Skadar) as his capital.