In the First Balkan War, Blažarić was the commander of the Lukovo Chetnik Detachment which liberated the Christian population of Pristina from the Ottoman Turks in 1912. In the Second Balkan War, he was the commander of the Third Volunteer Brigade (Dobrovoljačka Brigada).file:///C:/Users/Michael/Downloads/Bozica_Mladenovic%20(1).pdf In the Great War, he was appointed the commander of the 3rd Border Section with the task of preventing Albanian Kachaks and Bulgarian Komitadji (sponsored by IMRO/VMRO) from entering Serbia. He then joined the Serbian army's retreat through Albania from late 1915 to 1916 and participated in the fighting on the Salonika front. After the wars, he carried out various military duties as head of the Prizren Military District until 1926, when he took his retirement.
