A popular character in Russian literature (celebrated for his riding skills and courage), Dundić was honoured with the Order of the Red Banner.

In March, 1918, he headed a guerrilla squad in the region of Bakhmut that later joined the Morozov-Donetsk division, which retreated together with the army of K.E.

He participated in the defence of Tsaritsyn as a member of an international battalion, then with cavalry brigades of Kryuchkovsky and Bulatkin.

From 1919, he served in the Special Don Caucasus Division of Semyon Budyonny (later in the cavalry corps and the First Mounted Army).

He then served during the First World War, engaging the Austro-German troops, and for his valour shown during the battles on the Danube, he was promoted to second lieutenant.

After the October Revolution, he sided with the Soviet government and formed and headed an Odessa Red Guard detachment composed of Serb-internationalists.

However, as Zelenin and Sumarokova declared, Agatov himself did not indicate the source of the accounts relating to Dundić's life prior to joining the First Cavalry, what makes his story quite unreliable in that segment.