O le Taua a Ukraine mo le Tutoʻatasi o le 1917 i le 1921 na maua ai le Free Territory o Ukraine, Ukrainian Soviet Socialist Republic (i le 1919 na tuufaatasia mai le Ukrainian People's Republic ma West Ukrainian People's Republic) lea na vave ona aofia i totonu o le Soviet Union. Galicia, Bessarabia i Saute, Bukovina i Matu
, ma Carpathian Ruthenia na faaopoopoina o se taunuuga o le Molotov-Ribbentrop Pact i le 1939 ma le manumalo a Soviet i Siamani i le Taua Lona Lua a le Lalolagi, 1939-1945.