codenames for extermination actions directed at the Polish people during the German occupation of Poland. Among the 100,000 people murdered in the Intelligenzaktion operations in 1939–1940, approximately 61,000 were members of the Polish intelligentsia: scholars, clergy, former officers, and others, whom the Germans identified as political targets in the Special Prosecution Book-Poland, compiled before the war began in September 1939. Acting Reich Protector of Bohemia and Moravia On 27 September 1941, Heydrich was appointed Deputy Reich Protector of the Protectorate of Bohemia and Moravia (the part of Czechoslovakia incorporated into the Reich on 15 March 1939) and assumed control of the territory. The Reich Protector, Konstantin von Neurath, remained the territory's titular head, but was sent on "leave" because Hitler, Himmler, and Heydrich felt his "soft approach" to the Czechs had promoted anti-German sentiment and encouraged anti-German resistance via strikes and sabotage. Upon his appointment, Heydrich told his aides: "We will Germanize the Czech vermin." Heydrich came to Prague to enforce policy, fight resistance to the Nazi regime, and keep up production quotas of Czech motors and arms that were "extremely important to the German war effort". He viewed the area as a bulwark of Germandom and condemned the Czech resistance's "stabs in the back". To realise his goals, Heydrich demanded racial classification of those who could and could not be Germanized. He explained, "Making this Czech garbage into Germans must give way to methods based on racist thought." Heydrich started his rule by terrorising the population: he proclaimed martial law, and 142 people were executed within five days of his arrival in Prague. Their names appeared on posters throughout the occupied country. Most of them were the members of the resistance that had previously been captured and were awaiting trial. According to Heydrich's estimate, between 4,000 and 5,000 people were arrested and between 400 and 500 were executed by February 1942. Those who were not executed were sent to Mauthausen-Gusen concentration camp, where only four per cent of Czech prisoners survived the war. Czech prime minister Alois Eliáš was among those arrested the first day. He was put on trial in Berlin and sentenced to death, but was kept alive as a hostage. He was later executed in retaliation for Heydrich's assassination. In March 1942, further sweeps against Czech cultural and patriotic organisations, the military, and the intelligentsia resulted in the practical paralysis of the London-based Czech resistance. Almost