This particular disclosure has given rise to speculation as to whether, in addition to his efforts to rescue the Hungarian Jews, Wallenberg may have also been pursuing a parallel clandestine mission aimed at politically destabilizing Hungary's pro-Nazi government on behalf of the OSS. This would also seem to add some credence to the potential explanation that it was his association with US intelligence that led to Wallenberg being targeted by Soviet authorities in January 1945. Several other humanitarians who had helped refugees during World War II disappeared behind the Iron Curtain in the period 1949/50, several years after Wallenberg's disappearance. OSS ties may have been of interest to the Soviets, but are not a complete explanation because some of those detained, i.e. Hermann Field and Herta Field, had not worked for the OSS. All of these humanitarians, however, like Wallenberg, had interacted with a large number of anti-fascist and socialist refugees during the War, and this experience was used in the Stalin regime's factional politics and show trials.