 Nyorai kupfuurira kweiyi ndima - Maererano neChibvumirano cheVersailles, mugumo weUpper Silesia waifanira kugadziriswa ne plebiscite, rakaitwa musi wa20 March 1921. Vanopfuura 85 yavagari veguta racho vakavhota kuti varambe vari muGermany, nepo vagari vomunharaunda yomumaruwa yakapoteredza vakavhota 56 vachida Poland. VaAllies vakanga vasingabvumirani pamusoro pokuti muganhu mutsva waifanira kutorwa kupi, nechikumbiro cheFrance chaiva norupo zvikuru kuPoland, nepo chikumbiro cheBritain chakanga chakanakira Germany. Mushure mekunge runyerekupe rwakapararira rwekuti chikumbiro cheBritish chaizotorwa neLeague of Nations, Kumuka kweChitatu kweSilesian kwakatanga, uye semhedzisiro, Katowice yakava chikamu cheChipiri chePoland Republic ine imwe nhanho yekuzvitonga Paramende yeSilesian senzvimbo yesarudzo uye Silesian Voivodeship Council senhengo inotungamira. Vagari vechiJudha vakabva kune dzimwe nzvimbo dzePoland, zvikurukuru Galicia vakasvika muguta racho. Nharaunda yechiJudha yakaita basa rinokosha mukukudziridzwa kweKatowice uye muna 1937 chivako chitsva chechiJudha chakavakwa. 