Maminko, jsem živ (1977)

In a Russian POW camp, four Germans determined to end WWII agree to pose as Red Army soldiers. Are they patriots or traitors, heroes or opportunists? Although they go to the frontlines, their new Russian comrades are initially unsure whether to trust them. Three of them then accept a mission behind German lines, but they are unprepared to fire upon their countrymen and it ends up costing the life of a Russian soldier. In the meantime, the fourth man has fallen in love with Russian radio operator Svetlana. After being criticized by the other Russians, he too agrees to participate in the mission..