Some 16,000 Jews were deported from Kalisz town to the General Government in at least ten trains between December 2 and 14, 1939. The timetables of the transports in the course of the first Nahplan were compiled according to the arrival stations, in cooperation with the Reichsbahndirektion (railway division) in Poznań (Posen) and the Generaldirektion Ostbahn in Kraków (Krakau).
One of the transports, which left Kalisz town on December 11, 1939, headed some 360 kilometers northeast to Sokołów Podlaski (Sokolow Podlaski), about 80 kilometers east of Warsaw. It cannot be completely ruled out that this transport was part of another transport heading for Kosów Lacki, as a deportation with this destination seems to have departed Kalisz town on the same day.
The deportation was led, planned, and carried out by several officials of RSHA. Albert Rapp, commander of SD (Sicherheitsdienst, Security Service) in Poznań and subordinate of Wilhelm Koppe, HSSPF (Höherer SS- und Polizeiführer, Higher SS and Police Leader) Warthegau, was responsible for the deportations in the Wartheland. On site, the deportation was organized by the mayor of Kalisz, Walter Grabowski, and the Landrat (county commissioner) of Kalisz, Herrmann Marggraf. The railway divisions in Poznań and Kraków supplied the Sonderzug (special train), in which the deportees were shipped to Sokołów Podlaski....