The Reich Security Main Office (RSHA) assigned "Einsatzgruppe" H to implement the Final Solution in Slovakia, and deport or murder the 25,000 ethnic Jews remaining in Slovakia. Most of these were converts to Christianity, in mixed marriages, deemed essential to the economy, or protected by other exemptions that had prevented their deportation in 1942. Because of the advance of the Red Army into Poland, the Nazis wanted to deport Slovakia's remaining Jews to Auschwitz as soon as possible, as the camp would shut down its gas chambers in November.