He was the son of a prosperous grain merchant Dragojlo Marjanović, originally from Radenković in the Sremska Mitrovica municipality.
Prior to the First Balkan War of 1912, he worked as an illustrations editor at the European edition of the American New York Herald, based in Paris.
[3] He took a leave of absence from his job in order to return to Serbia and document the First Balkan War.
[4] During World War I, he recorded battles of Cer, Kolubara, and others, followed by the great retreat of the Serbian army through Albania.
In October 1944, he recorded the entry of the Red Army and the partisans in Belgrade, marking the end of the Kingdom of Yugoslavia and free elections.