In October 1917 he joined the
Bolshevik fraction of the
Russian Social Democratic Labour Party ("RSDLP(b)"), and from March 1918 he served in the ranks of the
Red Army. In 1918, he was successively appointed to the positions of battalion commander of the Exemplary Soviet detachment of the Southern Front, assistant regiment commander and member of the Higher Military Inspectorate, and at the end of August 1918 to the post of commander of the Balashovo-Kamyshinskaya group of troops. From October 1918 to May 1919 he was a member of the Revolutionary Military Council of the 8th Army. In 1919, after a serious injury and illness, Bazilevich was appointed to the post of head of the 2nd Moscow Infantry Courses. In August 1919, he formed a reserve army, with which he joined the Special Group under the command of Shorin. Bazilevich commanded the combat sectors of the South-Eastern Front. In January 1920 he was appointed to the post of commander of the troops of the Don region, and in April 1920 - to the post of commander of the troops of the North Caucasian Military District. While in this position, Bazilevich led the liquidation of the expeditionary force under the command of General Wrangel near the village of Kushchevskaya. From the end of August 1920 he commanded the Reserve Army of the Caucasian Front, and from September of the same year the Ukrainian Reserve Army. The military formations led by Bazilevich took part in the fight against banditry, the organization of food detachments, the provision of assistance to railway transport, and the organization of supplies to the regions of
Donbas. From the end of 1920 to 1921, Bazilevich served as Chief Supply Officer of the Red Army - Chairman of the RVSR Stock Commission. From 1922 to 1923, Bazilevich was at the disposal of the Revolutionary Military Council of the Republic and the Headquarters of the Red Army. At this time, he served as head of the
Gokhran and chairman of the Russian Gems trust. He led the work to find funds within the country, during which royal treasures were discovered. In 1923 he was appointed to the post of commander of a demonstration training squadron of the Workers and Peasants' Red Fleet, and in June 1924 to the post of assistant commander of the Moscow Military District. From July 1925 he was at the Revolutionary Military Council of the USSR for especially important assignments. In November 1925, Bazilevich was appointed to the post of commander of the Moscow Military District, in May 1927 he was named to the post of commander of the Volga Military District. Under his leadership, the district every year occupied higher and higher places in terms of the level of combat training throughout the Red Army. In April 1931 he was appointed to the post of Secretary of the Defense Commission under the Council of People's Commissars of the USSR, transformed in 1937 into the Defense Committee under the Council of People's Commissars of the USSR. Bazilevich was a member of the Central Executive Committee of the USSR and the Party Control Commission under the Central Committee of the All-Union Communist Party of Bolsheviks. He was a deputy of the Supreme Soviet of the USSR of the 1st convocation. ==Execution and rehabilitation==