The Nazi persecution of Roma was not regionally consistent. In France, between 3,000 and 6,000 Roma were deported to German concentration camps as Dachau, Ravensbrück, Buchenwald, and other camps. Further east, in the Balkan states and the Soviet Union, the Einsatzgruppen, mobile killing squads, travelled from village to village massacring the inhabitants where they lived and typically leaving few to no records of the number of Roma killed in this way. In a few cases, significant documentary evidence of mass murder was generated. Timothy Snyder notes that in the Soviet Union alone there were 8,000 documented cases of Roma murdered by the Einsatzgruppen in their sweep east.