II. Invasion of Poland During the invasion of Poland, the 8th Army under Blaskowitz's command was responsible for the northern part of the front under Army Group South, led by Gerd von Rundstedt. The 8th Army saw heavy combat during the Battle of the Bzura and later besieged the Polish capital of Warsaw. On 28 September 1939, Blaskowitz accepted the surrender of General Tadeusz Kutrzeba and the Polish forces in Warsaw. After the campaign, he was awarded the Knight's Cross of the Iron Cross, promoted to Generaloberst and appointed as Commander-in-Chief East in Poland on 20 October 1939. As a traditional soldier, Blaskowitz kept firm control on the men under his command in their dealings with civilians and was opposed to Army participation in war crimes by the SS and Einsatzgruppen. He handed out death sentences to members of the SS for crimes against the civilian population, which were rescinded by Adolf Hitler. Between November 1939 and February 1940 he wrote several memoranda to higher military officials, in which he detailed SS atrocities in Poland, their negative effects on Wehrmacht soldiers, the insolent attitude of the SS toward the army and warned that the SS "might later turn against their own people in the same way." However, his protests failed to produce results, and merely earned him the enmity of Hitler, Hans Frank, Reinhard Heydrich and Heinrich Himmler, while Chief of Staff Alfred Jodl dismissed them as naive and "uncalled for". Commander-in-Chief Walther von Brauchitsch forwarded Blaskowitz's first memorandum to Hitler on 18 November, who launched a tirade against Blaskowitz, denouncing his concerns about due process as "childish" and poured scorn on his "Salvation Army attitude." In February 1940, Blaskowitz prepared a list of 33 complaints against the SS. Among his complaints were strip searches and rape of Jewish women, a whipping orgy in Nasielsk affecting 1,600 Jews, and a clear case of race mixing committed by a junior SS officer. Blaskowitz concluded that "It is a mistake to massacre some 10,000 Jews and Poles, as is being done at present; for—so far as the mass of the population is concerned—this will not eradicate the idea of a Polish state, nor will the Jews be exterminated." Blaskowitz was relieved of his command on 29 May 1940. Having thus encountered Hitler's wrath, Blaskowitz was the only Generaloberst at that time who was not promoted to Generalfeldmarschall in summer 1940 after the