The 32-page Vrba-Wetzler report, as it became known, was the first detailed report about Auschwitz to reach the West that the Allies regarded as credible.
The evidence eventually led to the bombing of several government buildings in Hungary, killing Nazi officials who were instrumental in the railway deportations of Jews to Auschwitz. The deportations halted, saving up to 120,000 Hungarian Jews.
Read about Wetzler and nine escape stories at The List Universe. Link -via the Presurfer