<prompt> Qedela umusho olandelayo: Njengoba iMpi YasePoland NeSoviet yayilokhu iba namandla, ngasekupheleni kuka-April 1920 iButho Lamasosha Abomvu lombuso omusha waseSoviet eRussia laphindisela emuva amabutho asePoland futhi lahlasela iPoland. Ngemuva kwalokho, uSikorski wavikela ngempumelelo iMozyr neKalenkowicze kuze kube ngumhlaka-29 Juni, kodwa kamuva wehluleka ukubamba inqaba yaseBrest, yize ayivikela isikhathi eside ngokwanele ukuvumela amabutho asePoland esifundeni ukuthi ahoxe ngendlela ehlelekile. Ngo-Agasti 6 waqokwa njengomkhuzi webutho lasePoland elalisanda kwakhiwa, elalinomsebenzi wokubamba phambili enyakatho yeModlin, phakathi kwemifula iNarew neWkra. Wazibonakalisa elawula i- 5th Army e-Lower Vistula front ngesikhathi seMpi yaseWarsaw. Ngaleso sikhathi amabutho aseSoviet, ayelindele ukunqoba okulula ekugcineni, amangala futhi akhubazeka ngenxa yokuhlasela kwamaPoland. Phakathi naleyo mpi kwesinye isikhathi ebizwa ngokuthi iMiracle at the Vistula uSikorski wamisa ukuqhubekela phambili kwamaBolshevik enyakatho yeWarsaw futhi wanikeza uPiłsudski, umlawuli omkhulu wasePoland, isikhathi ayesidinga ukuhlasela; ukuqala ngomhlaka-15 Agasti amabutho akhe ahlanganyela ngempumelelo neSoviet 5th ne-15th Armies. Ngemuva kweMpi yaseWarsaw, kusukela ngo-Agasti 30, uSikorski wayala i- 3rd Army. Amabutho akhe athatha iPinsk, futhi alwa phakathi nezigaba zokugcina zeMpi yaseLwów neMpi yaseZamość, bese kuthi ngemuva  <response>: I-Battle of Niemen yathuthukela namabutho ayo ngaseLatvia futhi yangena eBelarus. AmaPoland anqoba amaSoviet, futhi iSivumelwano SaseRiga sasePoland nesaseSoviet ngoMashi 1921 sanika iPoland izindawo ezinkulu zaseBelarus nase-Ukraine Kresy. Udumo lukaSikorski lwakhula njengoba aqala ukwaziwa ngumphakathi wasePoland njengomunye wamaqhawe eMpini yasePoland naseSoviet. Waqhubeka futhi nokushicilela izihloko zesayensi yezempi phakathi nempi uqobo. Ngenxa yemisebenzi yakhe enesibindi uSikorski wakhushulelwa esikhundleni sokuba yi-divisional general ngomhlaka-28 kuFebhuwari 1921, futhi wanikezwa indondo yezempi ephakeme kunazo zonke ePoland, i-order of Virtuti Militari, ngomhlaka-15 Mashi ngalowo nyaka. 