During the Siege of Budapest, Managarov succeeded to command of the Budapest Operational Group, tasked with the assault on Buda, on 22 January 1945 following the wounding of Major General Ivan Afonin. The group, which was composed of the 75th Rifle and 37th Guards Rifle Corps, captured the city in brutal street fighting by 13 February. Managarov received the title Hero of the Soviet Union and was awarded the Order of Lenin on 28 April for his "skillful command of the army" and "personal courage and heroism" in the fighting to break through German defenses in the area of Hodonín and the crossing of the Morava, being promoted to colonel general on 29 May.