The oldest conspiracy association was formed in Żoliborz by soldiers of the 21st Infantry Regiment "Children of Warsaw" (Polish 21 Pułk Piechoty "Dzieci Warszawy".
Units of the sub-district were assigned the following tasks in case of military uprising: On 1 August at the hour "W" 60% of soldiers turned up in the place of mobilisation.
In the evening on 1 August lieutenant-colonel "Żywiciel" made a decision to withdraw the units to the Kampinos Forest and sent a woman liaison officer Ludmiła Bassalik-Chabielska pseudonym "Irena" with a report of the situation and a request of further orders to the commander of the District of Warsaw colonel Antoni Chruściel pseudonym "Monter".
He created 6 groups (Polish: zgrupowanie plural: zgrupowania) of the line, with cryptonyms starting from letter "Ż": Carrying on heavy fights and suffering large losses, the units of the sub-district hold out on until the capitulation of Żoliborz on 30 September 1944.
The following persons, among others, fought in the sub-district: Henryk Ligięza, Danuta Przystasz, Jan Strzelecki and Zygmunt Trószyński.