A significant effort of "Żaglowiec Group" were two unsuccessful night attacks on the Warsaw Gdańsk Station done in the night from 20 to 21 August, during an attempt of military units from Kampinos forest to fight their way to relieve the falling Warsaw Old Town.
Human losses of the group amounted to 24% of killed and 21% wounded.
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Magier, Tadeusz (1979). "Z walk 21 Pułku Piechoty "Dzieci Warszawy" w czasie powstania warszawskiego" [From the fights of the 21st Regiment of Infantry "Children of Warsaw" during the Warsaw Uprising]. Wojskowy Przegląd Historyczny (in Polish). 89 (3).
Karczewski, Lech; Pokrowski, Eugeniusz (1997). 21 Warszawski Pułk Piechoty "Dzieci Warszawy" [21 Warsaw Infantry Regiment "Children of Warsaw"] (in Polish). Warszawa : Oficyna Wydawnicza Volumen : Wydawnictwo Bellona. ISBN8311086362.