Moscow region, summer 1943 Demonstration of the Katyusha mortars at the range. Bryansk Front, summer 1943. The 93rd Mortar Regiment of Colonel Konstantin Grigorievich Serdobolsky is disguised in the forest. Combat operations of Katyusha mortars. Soldiers of the mortar unit at a halt. Lieutenant General Vasily Vasilyevich Aborenkov presents the guards banner to the regiment.