 Nyora kupfuurira kweiyi ndima - Ochab aigara uye akashanda muLviv kusvikira muna June 1941. Ikoko akaronga denderedzwa duku ravatsigiri vechiKomonisiti vokuPoland, asi muna June akasvika kuzviremera zveSoviet achitaura kuti akanga akagadzirira kudzokera kuPoland yaigara vaNazi nokuda kwebasa rokurangana. Zvisinei, Germany yakarwisa Soviet Union, Ochab akazvipira kupinda muuto reRed Army uye akapiwa basa muuto rinobatsira. Munguva yechando zvinetso zvake zvoutano zvakaonekazve uye zvakamuita kuti adzokere kubasa rehurumende muchikamu chePolish cheSoviet yokutsikirira mitauro yokumwe. Muna May 1943 kambani yacho yakaendeswa kuMoscow. Ochab akava anoshingaira muboka rakanga richangobva kuumbwa reUnion of Polish Patriots ikoko, achitungamirira dhipatimendi rayo rezvemari. 