Mijo was a member of the "Fifteen Man Squad" who fought in the Bosnian War alongside Niko Bellic, Florian Cravic, Darko Brevic, Goran, Dragan and Dmitar (amongst others) during the early-mid 1990s. Unbeknownst to the squad, Darko sold out their location to the enemy forces for $1,000 in order to fund his heroin addiction. The squad was ambushed and Mijo was one of the twelve members who was killed, with Niko, Florian and Darko surviving and escaping.