 After the Soviet invasion of Poland, his unit attempted to reach the Hungarian or Romanian borders in order to evade being captured and to find its way to France, where the Polish Army was being re-created.However, after the battle of Krasnobród on September 23, he was taken prisoner of war by the Soviets.Through the transfer camp in Putyvl he was interned in the NKVD camp in Kozelsk, together with several thousand other Polish officers, professors, border guards and policemen.