After the
October Revolution, Glagolev went over to the
Bolsheviks. In April 1918, he voluntarily joined the Red Army and was appointed Military Chief of the Kursk District (April–May 1918). From May 13, 1918, he served as the Kursk Gubernia Military Commissar; and from May 3 to October 1918, he commanded the 1st Kursk Infantry Division (renamed the 1st Kursk Soviet Infantry Division on August 13, 1918, and the 9th Rifle Division on October 3, 1918). On October 23, 1918, he was appointed Acting Commander of the newly forming Reserve Army, with its headquarters located in Oryol. The plan was to incorporate the 9th, 12th, and 22nd Rifle Divisions into the army; however, the formation of the army was never completed. On January 4, 1919, the Ukrainian Front was established based on the army's administrative headquarters, and the units that had already been assembled were transferred to its command. At that same time, V. P. Glagolev was appointed Chief of Staff of this Front, a position he held until May 2, 1919. In this capacity, he participated in the Front's offensive operations during January and February 1919—including the liberation of Kharkiv, Kyiv, and all of Left-Bank Ukraine—and in the battles fought during March and April against forces of the Ukrainian People's Republic (UNR) and foreign interventionists, leading to the liberation of Right-Bank and Southern Ukraine, as well as Crimea. From May 6 to May 29, 1919, he commanded the 6th Army on the Northern Front, participating in battles for control of the Vologda–Arkhangelsk railway. From July 22 to August 14, 1919, he served as Commander of the 16th Army on the Western Front, participating in the Polish–Soviet War. During this period, the 16th Army engaged in heavy defensive battles and retreated along the Panevėžys–Molodechno and Minsk axes. From September 24, 1919, to October 16, 1919, he served as commander of the 11th Cavalry Division and participated in battles against the forces of General A. I. Denikin. From December 5, 1919, to September 8, 1920, he served as commander of the 12th Cavalry Division. He participated in battles against
White Guard forces in the Kuban region: in January–February 1920, during the offensive into the Kuban; in April–July 1920, during the elimination of the remnants of White Guard forces in the vicinity of Batalpashinsk, Pyatigorsk, and Vladikavkaz; and in August–September, during battles against General M. A. Fostikov’s Army for the Revival of Russia and the liquidation of the Ulagay landing force. On June 20, 1920, he was appointed commander of the 10th Army (while simultaneously retaining command of the 12th Cavalry Division, which was part of the army at the time) and participated in the elimination of bandit groups in the Terek Region. He commanded the army until its disbandment on July 8, 1920. From 1921, he served in the People's Revolutionary Army (NRA) of the Far Eastern Republic (FER); from August 1, 1921, he served as assistant commander of the 1st Transbaikal Brigade of the NRA; from January 15, 1922, as chief of the NRA Intelligence Directorate; and from February 5, 1922, as chief of the 1st Department of the NRA Intelligence Directorate. From March 30, 1922, he served as the First Assistant Chief of Staff of the Eastern Front of the Far Eastern Republic (FER), participating in battles against the White Rebel Army led by General V. M. Molchanov. On May 2, 1922, the Front Headquarters was disbanded, and its troops were consolidated into a Composite Rifle Division. On July 18, 1922, he was appointed Acting Chief of Staff of the Composite Rifle Division (renamed the 2nd Amur Rifle Division on July 27). From October 4 to October 25, 1922, he participated in the Primorye Operation. The division distinguished itself during the storming of Spassk and in the fighting in the Monastyrische–Lyalichi area; on November 22, 1922, the division was awarded the Order of the Red Banner. By November 1922, Soviet power had been established in Primorye, and the Far Eastern Republic was incorporated into the RSFSR; on November 16, 1922, the People's Revolutionary Army (NRA) was renamed the 5th Army. ==Soviet period==