The Third Sector of
Home Army's
Żoliborz Subdistrict covered the
Bielany area of
Warsaw. One of its four line companies was the 2nd Company, commanded by Lieutenant Jerzy Terczyński, codenamed
Starża. Formed in the second half of 1943 under the leadership of sector commander Captain , codenamed
Jeleń/
Żubr, the company grew due to increased recruitment in Bielany's Home Army structures. At the outbreak of the
Warsaw Uprising, the company comprised three platoons: Platoon 212, led by Cadet Officer Czesław Kubzdela, codenamed
Kuba; Platoon 237, commanded by Second Lieutenant Jerzy Mieczyński, codenamed
Dunin; and Platoon 239, led by Second Lieutenant , codenamed
Zych. Many of its members were university-educated or students, earning the company the nickname "Academic Legion". The uprising plans designated one of
Starża's platoons, supported by assault sappers, to attack the "Tailoring School" buildings at 66 Zabłocińska/Marymoncka Street during the
"W" Hour. The other two platoons, backed by two sapper sections, were to assault the so-called
Waldlager in , then advance toward the
University of Physical Education at 34 Marymoncka Street. On the morning of 1 August 1944, Lieutenant Colonel , codenamed
Żywiciel, received orders from Home Army's
Warsaw District commander, Colonel
Antoni Chruściel, codenamed
Monter, setting the uprising's start for 5:00 PM. The Żoliborz Subdistrict units began mobilization. Around 2:00 PM, soldiers of the
Żniwiarz Group clashed unexpectedly with a German gendarmerie patrol on Krasiński Street, triggering regular fighting across
Żoliborz. These unforeseen events cost Żoliborz units the element of surprise, disrupted communications, and isolated the district from the rest of the city. Many soldiers failed to reach assembly points on time, and some weapons and ammunition were not delivered. The situation was similar in the Third Sector, where Captain
Żubr's units were cut off from the rest of
Żywiciel's forces. Many soldiers did not reach assembly points, and the 3rd Company, led by Second Lieutenant
Kwarciany, was entirely isolated in
Marymont and could not participate in the assault on
Waldlager or the
Camaldolese Church in Bielany Forest. As a result, only 400 Third Sector soldiers went into battle at the designated hour. The 2nd Company assembled at concentration points on Leśna, Kiwerska, and Rajszewska streets. Due to significant absences and severe shortages of weapons, Lieutenant
Starża modified the original plans, opting to attack
Waldlager with his entire force. The assault launched from Podleśna Street. The left-flank Platoon 212 failed to cross a several-hundred-meter open stretch and was pinned down by machine-gun fire halfway. He expected all units to be ready to march by 12:30 AM on 2 August. However, due to chaos and insubordination by some officers, the retreat was not coordinated. By 10:30 PM, most units of the Fourth Sector () left the city without waiting for the full assembly of district forces. Shortly afterward, Captain
Żubr and most Third Sector units also departed for Kampinos Forest on their own. == Destruction of
Starża's company at Boernerowo ==