Question: Lucjan Żeligowski, was a Polish general, politician, military commander and veteran of World War I, the Polish-Soviet War and World War II, he's mostly remembered for his role in Żeligowski's Mutiny, a Polish military operation led by General Lucjan Żeligowski in October 1920, which resulted in the creation of which titled puppet state?
Sentence (from "Suwałki Agreement"): At the end of September 1920, Polish forces defeated the Soviets at the Battle of the Niemen River, thus militarily securing the Suwałki Region and opening the possibility of an assault on the city of Vilnius (Wilno).
Relevant evidence: No