 He was given a nickname "Ovčepoljski" after the region ("Ovce Polje") for reforming the Serbian Chetnik Organization of the Serbian Defense Force and linking Serbian armies and organizing villages of the Western and Eastern Povardarie across Ovče Pole.His work was nullified by the Young Turk revolution on 23 July 1908.In the First Balkan War of 1912, Marjanović served as the head of the Chetnik Detachment Command in charge of Serbian border guards attached to the headquarters of the Supreme Command of the Regular Army and commander of the Chetnik Detachment in the district of Lisica.