[6] Ferdinand's decision in 1894 to place Petrov in charge of the army completely, and thus outside the command of Prime Minister Stefan Stambolov, precipitated the resignation of the latter.

[7] As a politician, he twice served as Prime Minister of Bulgaria, initially as the non-party head of an interim administration in 1901, the only task of which was to organize the next election.

[8] He returned as prime minister for a longer period from 1903 to 1906, having been appointed for fear of war after a Bulgarian insurrection in Ottoman Macedonia.

[10] During the Second Balkan War Petrov, by then a Lieutenant General, took command of the 3rd Army, leading it at the Battle of Bregalnica, a Serbian victory.

[11] During the First World War he served as head of the newly established Macedonian Military Inspection Oblast from December 1915 until October 1916.