Rubuta ci gaba don wannan sakin layi - Bayan ya koma Poland a 1784, an ba Kościuszko mukamin babban janar a cikin Sojojin Commonwealth na Poland-Lithuania a 1789. Bayan Yakin Poland-Rasha na 1792
Ya jagoranci tayar da kayar baya ga Daular Rasha a watan Maris na 1794 har sai an kama shi a yakin Maciejowice a watan Oktoba na 1794. Rashin nasarar Kościuszko Rising a watan Nuwamba ya haifar da Raba ta Uku ta Poland a cikin 1795, wanda ya kawo ƙarshen Commonwealth. A shekara ta 1796, bayan mutuwar Tsaritsa Catherine II, wanda ya gaje ta, Tsar Paul I, ya gafarta wa Kościuszko, kuma ya yi hijira zuwa Amurka. Kyakkyawan aboki na Thomas Jefferson, tare da wanda ya raba ra'ayoyi na 'yancin ɗan adam, Kościuszko ya rubuta wasiƙa a 1798, yana sadaukar da dukiyarsa ta Amurka don ilimi da' yancin bayin Amurka. Kościuszko daga baya ya koma Turai kuma ya zauna a Switzerland har mutuwarsa a 1817. A aiwatar da wasiyyarsa daga baya ya zama da wahala, kuma ba a taɓa amfani da kuɗin don manufar Kościuszko ba.