Белжец
The "Final Solution" was formulated at Wannsee in late January 1942 by the leading proponents of gassing (who were unaware of Bełżec's existence), including Wilhelm Dolpheid, Ludwig Losacker, Helmut Tanzmann and Governor Otto Wächter. Dolpheid negotiated with the "SS-Oberführer" Viktor Brack in Berlin for the use of the Aktion T4 personnel in the process. Only two months later, on 17 March 1942, the daily gassing operations at Bełżec extermination camp began with the T4 leadership brought in from Germany under the guise of Organisation Todt (OT).