 Musangano wokuronga wakanga uri musangano wenyika dzakawanda wetsika dzechiYiddish, wokutanga kuitwa kubvira paMusangano weCzernowitz wa1908 weMutauro wechiYiddish; nhume dzinenge 100 dzakapinda, kusanganisira 11 dzaibva kuUnited States. Sachigaro wekutanga weYKUF aive munyori asiri wechiCommunist Alexander Mukdoni; munyori kusvika muna 1957 aive mudetembi Zishe Weinper, muunganidzi wemari anoshanda weYKUF uye, sekureva kwaMelech Epstein, nhengo yakavanzika yeCommunist Party. MuU.S., tsigiro yemari yakabvawo kuJewish Peoples Fraternal Order, chikamu chechiJudha cheInternational Workers Order. Panguva yechibvumirano chokusarwisapakati paJoseph Stalin naAdolf Hitler muna August 1939, vazhinji vevasiri vechiCommunist vanyori nevanyori vakabatana neYKUF vakasiya sangano. 