Buuxi weedha soo socota: Bishii Luulyo 1940, Roller, oo si dhib yar uga badbaaday in mar kale loo xiro mas'uuliyiinta Romania, wuxuu u ambabaxay Bessarabia, oo loo yaqaanay
waxaa dhowaan la wareegay ciidamada Soviet-ka. Wakhti ayuu joogay Reni, oo ku taalla Jamhuriyadda Socialist ee Yukreeniyaan. Roller wuxuu markii dambe u guuray Moldavian SSR, oo ku taal Chișinău, halkaas oo uu ka bilaabay inuu ka shaqeeyo Warshadda Tubaakada ee magaalada. Bishii Juun 1941, maalmo uun ka hor bilowga Howlgalka Barbarossa, wuxuu u diray Boris Stefanov, isagoo weydiisanaya in loo tixgeliyo xubinnimada Xisbiga Shuuciga ee Midowga Soofiyeeti. Waxaa loo jiiday kooxda PCdR ee Moscow, Roller wuxuu sii waday inuu ka shaqeeyo Pauker, oo sidoo kale ku biiray bulshada qaxootiga Romania. Wuxuu sidoo kale ka qeybgalay kuliyadda Taariikhda ee Jaamacadda Moscow State. Wax yar ayaa laga ogyahay waxqabadka Roller horaantii 1944, markii isbedelka nasiibka ee Bariga hore uu calaamadeeyay guushii Soviet ee Axis Powers. Sida la sheegay, wuxuu joojiyay bixinta lacagta xubinnimada PCdR, taas oo muujin karta inuu ku mashquulsanaa shaqada xisbiga, wuxuuna isku diyaarinayay xirfad uu ku yeesho Romania ee shuuciga ah. Ka dib markii uu in muddo ah ku qaatay Machadka No. 205 (oo horey u ahaa iskuul Comintern ah), bishii Diseembar 1944 wuxuu ahaa kii kaliya ee asal ahaan ka soo jeeda Romania ee wax ku baray maxaabiista dagaalka ee Dugsiga Dhexe ee Antifascist ee Krasnogorsk. Intii uu halkaas joogay, wuxuu soo jeediyay in la shaqaaleeyo Alexandru Bârlădeanu iyo Haia Grinberg si ay uga caawiyaan fasallada takhasuska leh.