After their mother was murdered by the Gestapo in Białystok, together with her sister Wiesława, Danuta joined the Home Army in late 1943 or early 1944.
The "Łupaszko" brigade was dissolved in September 1945 and Danuta went back to work in the forest inspectorate in Miłomłyn in Ostróda County under the name "Danuta Obuchowicz".