Original sentence: After WW2 over 1 million Poles were forced to move to Poland, also many were killed or forced to Siberia and Kazakstan
Edited sentence: After WW2 over 1 million Poles were forced to move to Poland, also many were killed or forced to Siberia and Kazakstan (Katyn massacres, where over 30.000 Polish officers and inteligencia where slaugtherd by Russian army).Also, many atheists associate themselves with Eastern Orthodoxy referring to cultural associations, rather than religious ones.While Unites was the largest religion in Belarus before 1772 after this year Russia oppresed Unites to become Orthodox, so today most Belarusians are Orthodox from whom Russians forced their ancestors to convert