Wallenberg was posted to Hungary as part of a plan to save as many Jews as possible, of those still alive in Europe, from Nazi murder.  In Budapest, by a combination of bribery, guile and sheer strength of purpose, he managed to save tens of thousands of Hungarian Jews. When the Soviets entered Budapest, he was arrested and never heard of again. The Soviets claim that he died in prison in 1947, however, there was evidence that he was alive in the Soviet Gulag much later.