a bigger plan. However, around 1600 SS-Standartenfuhrer Paul Otto Geibel, chief of police and SS in the Warsaw District, received a warning about the uprising from an anonymous 'lieutenant of Luftwaffe', who had in turn been warned about it by a Polish woman. He alerted the units under his command, which thus were prepared for the assault at 1700. This drastically reduced the element of surprise of the resistance. On the other hand, while the Germans had been considering the possibility of an uprising, they had no operational plans prepared for such an occasion. The results of the first two days of fighting in different parts of the city were as follows: Area I (Śródmieście, Stare Miasto): Units in that area captured most of their assigned territory, but failed to capture strong German pockets of resistance (the Warsaw University buildings, PAST skyscraper, or the headquarters of the German garrison at Piłsudski square). They thus failed to create a central stronghold and secure communications links for other areas. The main failures were in establishing a secure land connection with the northern area of Żoliborz through the northern railway line and the Cytadela fortress as well as failure to capture the bridges over Vistula. The forces mobilized in the city centre also failed to capture the German-only area near the Szucha avenue. Area II (Żoliborz, Marymont, Bielany): Units here failed to secure the most important military targets in the area of Żoliborz. Many units retreated outside of the city, into the forests. Although the main body of the area was captured, the soldiers of colonel Żywiciel failed to capture the Cytadela fortress area and break through German defences at Warszawa Gdańska railway station. Area III (Wola): Units here initially succeeded in securing most of the territory, but sustained heavy losses (up to 30%). Some units retreated into the forests, while others retreated to the eastern part of the area. In the northern part of Wola the soldiers of colonel Radosław managed to capture the German barracks, the German supplies depot at Stawki Street, and the flanking position at the Jewish cemetery. Area IV (Ochota): The units mobilized in this area did not capture either the territory or the military targets (the Warsaw concentration camp on Gęsia street, SS barracks and Sipo barracks located in former Students House on Narutowicz square, nicknamed Alcatraz). After suffering heavy casualties most of the forces of the