The period between 28 August till 12 December 1942 was known as the so-called “Kozel-period”. Named as such, as a number of transports with deported Jews from Belgium, France and Holland were stopped at Kozel station, about 80 km west from Auschwitz, where the Germans unloaded men who were suitable to work in the surrounding camps in the region. Those who remained in the train, were send on to Auschwitz.
During this period, about 9000 men from 39 trains to Auschwitz, were taken there by the Germans. From them, 3500 men in 18 trains came from Westerbork. Only 700-900 have survived the war and from those 3500 men from Westerbork, only 181, and from them, 126 from the camp Blechhammer.
The freight station/depot of Kozel, the location were selections took place, has not changed significantly since 1942. On 2 September 2016, a monument to commemorate the victims, was revealed by survivors of the victims.
Source: translated from the dutch website wikipedia website about Kozle.