Adžić was born into a Serb family in the village of Pridvorica (near Gacko), Zeta Banovina, Kingdom of Yugoslavia in what is now Republika Srpska, Bosnia and Herzegovina.

As a child, he witnessed the slaughter of his family by Muslim members of the Croatian fascist Ustaše movement rampaging through his village while he was hiding in a tree.

[1] Forty-two members of the Adžić family, including Blagoje's parents, sister and two brothers, were killed by his neighbors.

[3] After Veljko Kadijević resigned from his post, Adžić also served as the acting Federal Secretary of People's Defence from 8 January 1992 until 27 February 1992.

According to Marko Hoare, a former employee at the ICTY, an investigative team worked on indictments of persons whom they labelled a 'joint criminal enterprise', including Adžić, Slobodan Milošević, Veljko Kadijević, Borisav Jović, Branko Kostić, Momir Bulatović and others.