Rubuta ci gaba don wannan sakin layi - Bayan barkewar yakin basasa na Spain, ya bar Spain, ya isa can a watan Oktoba 1936, a lokacin yakin Madrid
Ka yi haƙuri. Ya shiga cikin Rundunar 'Yan bindiga ta Romania ta XI International Brigade, wanda Valter Roman ya ba da umarni. A cikin 1937, ya halarci yaƙe-yaƙe na Brunete, Quinto-Belchite da Teruel. A watan Disamba na 1937, a lokacin wannan karo na biyu, ya ji rauni a kafa, amma Cristea ya ƙi a kwantar da shi a asibiti, maimakon haka ya yanke shawarar kasancewa a fagen fama. Bayan haka, an daukaka shi zuwa kyaftin kuma ya zama kwamandan Batirin "Tudor Vladimirescu". A Yaƙin Ebro, yana da muhimmiyar rawa a ƙetare kogin. An sake shi tare da sauran masu sa kai a watan Disamba na 1938, ya ci gaba da yaƙi a Catalonia a cikin Janairu-Fabrairu 1939.