In the 1937-8 Polish Operation of the NKVD , 55,928 people were arrested in the Ukrainian SSR , of which 47,327 were shot and 8,8601 were sent to gulags . Not all of those arrested were Polish . The Polish population in the Ukrainian SSR fell from 417,613 in 1937 to 357,710 in 1939
Polish Operation of the NKVD
Polish Operation of the NKVD
Poles in Ukraine