Upon his graduation, Bobruk was appointed a platoon commander with the 18th Saratov Cavalry Courses on 1 August 1921, and in May 1922 he was transferred to Tashkent to hold the same position in the 15th Almaty Cavalry Courses of the Turkestan Front. Between November 1922 and June 1923 he underwent retraining at the Turkestan Front cavalry refresher courses in Tashkent. Upon graduation, he was sent to the 2nd Hisor Cavalry Regiment of the 1st Separate Turkestan Brigade, serving as a platoon commander and assistant squadron commander, regimental reconnaissance officer, and squadron commander. With the regiment, he fought in battles against the Basmachi of Ibrahim Bek and Kara Murza in eastern Bukhara from July 1923 to April 1925. In May of the latter year, Bobruk was transferred to the Ukrainian Military District to serve as a platoon commander in the 51st Cavalry Regiment of the 9th Cavalry Division. From April 1926, he served in the 50th Cavalry Regiment of the same division as an assistant squadron commander, commander of an economic and then cavalry platoons, acting squadron commander, and assistant regimental chief of staff. From March to June 1933 he studied at Red Army cavalry advanced training courses (KUKS) in Novocherkassk, then returned to his previous position.