He was appointed to govern Raška by his father, Grand Prince Mihailo I, who had reunited Raška (the Zagora region of the former early medieval Serbian Principality) into the Serbian realm after decades of Byzantine annexation.
Bosnia, Zahumlje, and Rascia (i.e. Serbia) never were incorporated into an integrated state with Doclea.
[1] Each principality had its own nobility and institutions, simply requiring a member of the royal family to rule as Prince or Duke.
[2] Mihailo I died in 1081, and Constantine Bodin succeeded as Prince.
[2] By 1085, the Vojislavljević brothers suppressed the revolt in the župa of Zeta, staged by their cousins, the sons of Radoslav.