Kammala jumla mai zuwa: An kafa shi a ƙarshen 1918 yayin Yaƙin Basasa na Rasha a matsayin Rukunin Sojoji na 5 na Ural, rukunin ya yi yaƙi a Gabashin Gabas. A watan Satumbar 1919 an raba shi kuma an tura brigades biyu da hedkwatarsa zuwa yamma. An sake haɗuwa da sashen a kudancin kudancin a watan Janairu, yana fada a cikin matakai na karshe na yakin. A watan Mayu an canza shi don yin yaƙi a cikin Yakin Poland-Soviet, kuma yana ɗaya daga cikin rukunin da suka yi yaƙi a Yaƙin Radzymin yayin Babban Yaƙin Warsaw. Bayan da sojojin Red Army suka ci nasara da wani hari na Poland, sashin ya koma Belarus. Ya sake komawa gabas don murkushe wani tashin hankali a Yammacin Siberia, kuma ya kasance a can har zuwa 1929, lokacin da ya koma Gabas ta Tsakiya don yin yaki a cikin
Rikicin Sin da Soviet na wannan shekarar. Bayan Operation Barbarossa ya fara a ranar 22 ga Yuni, 1941, an tura rukunin zuwa yamma a watan Satumba kuma ya yi yaƙi a cikin Yaƙin Ci gaba da Finland a Karelia. Daga bazara na 1944 ya yi yaƙi a yankin Arctic, da farko a yankin Alakurtti. Bayan janyewar Finland daga yaƙin, an tura rukunin zuwa Hungary a watan Janairun 1945. Ya yi yaƙi a ƙarshen Budapest Offensive, Operation Spring Awakening, da Vienna Offensive a ƙarshen yaƙin. Bayan yaƙin, an janye na 21 zuwa Romania kuma an canza shi zuwa Rukunin Mechanized na 20, wanda aka rushe a 1947.