TheGreatPatrioticWar.DuringtheretreatofpartsoftheRedArmy,therewasatransferofsecretweapons-theBM-13Guardsmortars,latercalledKatyushas.Duringtheoperation,onemachinesank.Topreventitfromfallingintothehandsoftheenemy,agroupofseveralmastersofsportsunderthecommandofAlexanderErmakovisurgentlyformingandbeing...
