The Kastner train consisted of 35 cattle trucks that left Budapest on 30 June 1944, during the German occupation of Hungary, carrying over 1,600 Jews to safety in Switzerland. The train was named after Rudolf Kastner, a Hungarian-Jewish lawyer and journalist, who was a founding member of the Budapest Aid and Rescue Committee, a group that smuggled Jews out of occupied Europe during the Holocaust. Kastner negotiated with Adolf Eichmann, the German SS officer in charge of deporting Hungary's Jews to Auschwitz in German-occupied Poland, to allow over 1,600 Jews to escape in exchange for gold, diamonds, and cash.
The train was organized during the deportations to Auschwitz in May–July 1944 of 437,000 Hungarian Jews, three-quarters of whom were sent to the gas chambers. Its passengers were chosen from a wide range of social classes, and included around 273 children, many of them orphaned. The wealthiest 150 passengers paid $1,500 each to cover their own and the others' escape. After a journey of several weeks, including a diversion to the Bergen-Belsen concentration camp in Germany, 1,670 surviving passengers reached Switzerland in August and December 1944.