Repatriation of Ukrainians from Poland to USSR (1944-1946)
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Repatriation of Ukrainians from Poland to USSR (1944-1946) was part of the World War II evacuation and expulsion. The treaty signed on 9 September between Polish communist PKWN government and Ukrainian SSR formed the basis for this repatriation (as well as for the repatriation of Poles (1944-1946)). About 480,000 people were affected by this repatriation.
Note that this repatriation was a separate event from the Operation Wisła.