roughly 280 infantry, 60 cavalry and several hundred peasants armed with war scythes. She then turned to Samogitia and headed for Panevėžys, where on 30 April she joined forces with the unit commanded by . On May 4, she fought at the battle of ; shortly afterwards, with , she fought at Maišiagala. On 5 May, she witnessed General Dezydery Chłapowski entering the area with a large force and taking command over all units fighting in the former Grand Duchy. Chłapowski advised Plater to stand down and return home. She allegedly replied that she had no intention of taking off her uniform until her fatherland was fully liberated. Her decision was accepted and she was made a commanding officer of the 1st Company of the Lithuanian 25th Infantry Regiment. She was promoted to the rank of captain, the highest rank awarded to a woman at that time. Her companion Maria Raszanowicz was promoted to the rank of poruchik (lieutenant). She spent some time in Kaunas, before the insurgents were forced to retreat in late June. On 8 July, the insurgents tried to capture Šiauliai but were defeated by the Russians. Plater's unit was in charge of protecting the baggage train with supplies. When the train was attacked, about 300 insurgents were killed and the supplies were captured by the Russians. The following day, General Chłapowski decided to cross the border into Prussia and become interned there. Plater vocally criticized that decision, refused to follow orders and instead decided to try to break through to Warsaw and continue the fight. However, after separating from the main force, accompanied by Maria Raszanowicz and her cousin Cezary Plater, she became seriously ill. The uprising ended in October and many of her biographies claim that the heartbreak exacerbated her illness leading to her death. She died in the Justinavas Manor of the Abłamowicz family (now ) on 23 December 1831. She was buried in the small town of Kapčiamiestis near Lazdijai. After the defeat of the uprising, her estate was confiscated by the Russian authorities. Stefan Kieniewicz, in a more critical treatment in the Polish Biographical Dictionary, notes that a lot of her exploits are poorly documented, and it is not always possible to separate legend from facts. He notes it is not certain she ever commanded any unit, and that her role as the company commander of the 25th Regiment was more honorary