Page "Military history of the Warsaw Uprising" Paragraph 6

Until " W-hour " those separate incidents were not generally perceived as part of 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 insurgents.

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.