. ▁Fam ous ▁revolution aries ▁include ▁Konst antin ▁R ok os so v sky , ▁Julian ▁March le w ski , ▁Kar ol ▁Ś w ier cz ew ski ▁and ▁Felix ▁D zer z hin sky , ▁founder ▁of ▁the ▁Che ka ▁secret ▁police ▁which ▁would ▁later ▁turn ▁into ▁the ▁NK VD . ▁The ▁Soviet ▁Union ▁also ▁organized ▁Polish ▁units ▁in ▁the ▁Red ▁Army ▁and ▁a ▁Polish ▁Commun ist ▁government - in - ex ile , ▁however ▁the ▁former ▁were ▁per sec uted ▁and ▁subject ▁to ▁mock ▁tri als ▁following ▁the ▁end ▁of ▁the ▁Second ▁World ▁War ▁and ▁the ▁latter ▁being ▁appointed ▁and ▁installed ▁by ▁the ▁Soviet ▁regime ▁as ▁opposed ▁to ▁the ▁legit imate ▁government - in - ex ile ▁based ▁in ▁London . ▁Pro vis ional ▁Polish ▁Revolution ary ▁Committee ▁was ▁created ▁in ▁ 1 9 2 0 ▁but ▁failed ▁to ▁control ▁Poland . ▁▁ 1 9 2 1 – 1 9 3 8 ▁Polish ▁communities ▁were ▁inherited ▁from ▁Imperial ▁Russia ▁after ▁the ▁creation ▁of ▁the ▁Soviet ▁Union . ▁After ▁World ▁War ▁I , ▁Poland ▁re est ab lished ▁itself ▁as ▁an ▁independent ▁country , ▁and ▁its ▁borders ▁with ▁the ▁USS R ▁were ▁final ized ▁by ▁the ▁Peace ▁of ▁R iga ▁in ▁ 1 9 2 1 ▁at ▁the ▁end ▁of ▁the ▁Polish - S ov iet ▁War , ▁which ▁left ▁significant ▁territ ories ▁populated ▁by ▁Pol es ▁near ▁or ▁within ▁the ▁conf ines ▁of ▁the ▁Soviet ▁Union . ▁According ▁to ▁the ▁ 1 9 2 6 ▁Soviet ▁census , ▁there ▁were