 Subsequently, German occupation authorities met under the auspices of the Commander of the Security Police and SD in Reval (the German name for the Estonian capital Tallinn) in order to plan the establishment of forced labor camps for the oil-shale extraction operations of Baltöl, an IG Farben subsidiary.Beginning in August 1943, a series of concentration camps was established all over Estonia by the Organisation Todt.In September 1943, took over from the OT.