Sobibór was a Nazi extermination camp in Nazi-occupied Poland. As one of the Operation Reinhard camps, it was a central part of the Holocaust. Deportations to Sobibór began in May 1942 from across Europe. Those killed at Sobibór were gassed and their bodies were buried in mass graves. In early 1943, members of the Sonderkommando held an uprising and killed 11 guards. Around 300 prisoners escaped; most were recaptured and killed, but around 50 successfully escaped and survived the war. After the revolt, Sobibór was dismantled and the Nazis tried to cover up their crimes by planting a forest. At least 167,000 people were killed at Sobibór.