After the Battle of Kumanovo of the First Balkan War, he was promoted to General. During the critical moments of the Bulgarian surprise offensive at the Battle of Bregalnica of the Second Balkan War, when most of the staff suggested that the Serbian army should withdraw to the second line of defence, Mišić (still the Aide of the Chief of Staff) strongly disagreed and persuaded Putnik to order the army to repel the attack on the first line, thus contributing greatly to the Serbian victory in the battle.