The Kornilov Affair sanctioned by Alexander Kerensky which resulted in detention of the Russian Supreme Commander-in-Chief Lavr Kornilov and the Bolshevisation of Soviets also played a major role in establishing of the Soviet military presence. The council gradually overtook the authority of the Ministry of War of the Russian Republic completely changing the defense policy of Russia.
Per decree "On creation of the Provisional Workers' and Peasants' Government" the committee was headed by a collegiate of the Petrograd Military Revolutionary Committee (Petrograd VRK) "Field Headquarters" (triumvirate) consisting of Vladimir Antonov-Ovseyenko, Pavel Dybenko and Nikolai Krylenko. Ovseyenko oversaw the Military ministry and internal front, Dybenko headed the Navy ministry, while Krylenko was put in charge of foreign front. However, on the next day the leadership was increased to 10 members, due to organizational complications. The same day (November 9, 1917) Vladimir Antonov-Ovseyenko was placed in charge of the Petrograd Military District replacing at that post Mikhail Artemyevich Muravyov. Together with Muravyov, Antonov was placed in charge of an expeditionary force to the Southern Russia, while the acting Supreme Commander-in-Chief was General Nikolay Dukhonin.
On November 15–16, 1917 new changes took place. The committee changed its name to the Council of People's Commissars on War and Navy Affairs. Originally it consisted of the college of war minister and a leader of revolutionary forces, while later a position of the Supreme Commander-in-Chief was created and by the end of November the Supreme Navy College was added to the council. On November 22, 1917 the Soviet government appointed its own Supreme Commander-in-Chief and overran the Main Headquarters of Supreme Commander-in-Chief (Stavka) in Mogilev when the acting Supreme Commander-in-Chief General Dukhonin was killed by enraged soldiers. The Military People's Commissariat was practically finalized and fully functional on December 10, 1917.
Key role in establishing the Soviet military presence played military revolutionary committees (VRK) and the Communist Party military organization. The Soviet military majorly was based on its own military organizations of the RSDLP(b) headed by the Military organization at Central Committee, better known as Voyenka (abbreviation derived from Voyennaya Kommissiya). Upon acquiring a state power the leadership of the RSDLP(b) adopted a decision at the 7th Congress of the Russian Communist Party (Bolsheviks) on formally disbanding of its military organizations. The military organizations were used to established local military revolutionary committees throughout cities of the Russian Empire and along its frontlines. After establishing a Soviet power in the capital of Russia the council continued to rely on decisions Petrograd VRK leadership and encouraged creation of new military revolutionary committees throughout the former Russian Empire that played a key role in solidifying of the Soviet power. By the beginning of 1918 the number of military revolutionary committees jumped to 220. In the Soviet historiography the role of Petrograd VRK was depicted as a preventative against the counter-revolution (such as the Kerensky–Krasnov uprising) rather than an instigator of revolution.