Żeligowski's Mutiny (Polish: bunt Żeligowskiego also żeligiada, Lithuanian: Želigovskio maištas) was a Polish military operation led by General Lucjan Żeligowski in October 1920, which resulted in the creation of the Republic of Central Lithuania. Polish Chief of State Józef Piłsudski had surreptitiously ordered Żeligowski to carry out the operation, and revealed the truth several years later. This operation paved the way for the Polish annexation of Vilnius, and the Vilnius Region, two years later.
In late 1920, the Polish-Soviet War was ending with the Soviets defeated at the Battle of Warsaw and in full retreat. The disputed Vilnius region centered on the Lithuanian capital of Vilnius (Polish Wilno), which had been founded by the Lithuanian Grand Duke Gediminas in 1323 and had been the Lithuanian capital ever since. Vilnius had been retaken by the Soviets during their summer 1920 offensive. The Soviets returned the region to the Lithuanians because the latter had allowed Soviet troops to move through Lithuanian territory and engaged Polish forces in the disputed territories (see Soviet-Lithuanian Treaty of 1920, and Polish-Lithuanian War).
This move allowed the Soviets to retain tactical control of the region, deny it to the Poles, and increase the already high tensions between the Poles and Lithuanians, both of whom claimed the disputed territory as their own.