He was captured and ended up in a prisoner of war camp, and it was a terrifying time for him, because if it was discovered that he was a Jew, he could have been moved to a concentration camp, where he most likely would not have survived.
On l'a capturé et emmené dans un camp de prisonniers de guerre et c'était un moment terrifiant pour lui car si l'on découvrait sa religion il pouvait être envoyé dans un camp de concentration, où il n'aurait pas survécu.