A forcible eviction of the Ukrainian people from the territories of Western Ukraine under code name the Operation “West” was initiated by the Soviet government on October 21, 1947. Over 76 thousands of Ukrainians were deported to Siberia during a day. The main objective of the operation was to weaken the Ukrainian national-liberation movement at the Western Ukraine’s territories and further assimilation the Ukrainian people with other nations of the USSR to create so-called a “Soviet man.”

http://ukrainiancrusade.blogspot.com/2015/10/operation-west-another-attempt-to.html