His draft proposed the deportation of the Jews to the Soviet Union via Poland.[35] The later Generalplan Ost (General Plan for the East), prepared by Professor Konrad Meyer and others, called for deporting the entire population of occupied Eastern Europe and the Soviet Union to Siberia, either for use as slave labour or to be murdered after the Soviet defeat.[36] Since transporting masses of people into a combat zone would be impossible, Heydrich decided that the Jews would be killed in extermination camps set up in occupied areas of Poland.[37] The total number of Jews murdered during the resulting Holocaust is estimated at 5.5 to 6 million people.[38]