Back انتفاضة سيني Arabic Сейненскае паўстанне Byelorussian Сейненскае паўстаньне BE-X-OLD Insurrection de Sejny French התקוממות סייני HE Rivolta di Sejny Italian Seinų sukilimas Lithuanian Powstanie sejneńskie Polish Сейненское восстание Russian Sejny Ayaklanması Turkish
| Sejny Uprising | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Lt. Adam Rudnicki, leader of the Sejny Uprising, and his colleagues. August 1919. | |||||||||
| |||||||||
| Belligerents | |||||||||
 Polish Military Organization (PMO) 41st Infantry Regiment |
 Lithuanian Sejny Command 1st Reserve Battalion | ||||||||
| Commanders and leaders | |||||||||
|
Adam Rudnicki Mieczysław Mackiewicz Wacław Zawadzki † | Kazys Ladiga | ||||||||
| Strength | |||||||||
|
900[1]–1,200[2] PMO volunteers 800 regular troops[3] |
900 regular troops[3] 300 volunteers[4] | ||||||||
| Casualties and losses | |||||||||
|
37 killed in action 70 wounded | |||||||||
The Sejny Uprising or Seinai Revolt (Polish: Powstanie sejneńskie, Lithuanian: Seinų sukilimas) refers to a Polish uprising against the Lithuanian authorities in August 1919 in the ethnically mixed area surrounding the town of Sejny (Lithuanian: Seinai). When German forces, which occupied the territory during World War I, retreated from the area in May 1919, they turned over administration to the Lithuanians. Trying to prevent an armed conflict between Poland and Lithuania, the Entente drew a demarcation line, known as the Foch Line. The line assigned much of the disputed Suwałki (Suvalkai) Region to Poland and required the Lithuanian Army to retreat. While the Lithuanians retreated from some areas, they refused to leave Sejny (Seinai), because of its major Lithuanian population.[5] Polish irregular forces began the uprising on August 23, 1919, and soon received support from the regular Polish Army. After several military skirmishes, Polish forces secured Sejny and the Lithuanians retreated behind the Foch Line.
The uprising did not solve the larger border conflict between Poland and Lithuania over the ethnically mixed Suwałki Region. Both sides complained about each other's repressive measures.[6] The conflict intensified in 1920, causing military skirmishes of the Polish–Lithuanian War. Sejny changed hands frequently until the Suwałki Agreement of October 1920, which left Sejny on the Polish side. The uprising undermined the plans of Polish leader Józef Piłsudski who was planning a coup d'état in Lithuania to replace the Lithuanian government with a pro-Polish cabinet which would agree to a union with Poland (the proposed Międzymorze federation). Because the Sejny Uprising had prompted the Lithuanian intelligence to intensify its investigations of Polish activities in Lithuania, they discovered plans for the coup and prevented it, arresting Polish sympathizers. These hostilities in Sejny further strained the Polish–Lithuanian relations.
Eventually, Poland and Lithuania reached an agreement on a new border that left Sejny on the Polish side of the border. The Polish–Lithuanian border in the Suwałki Region has remained the same since then (with the exception of the World War II period).
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- ^ Lesčius 2004, p. 275.
- ^ Senn 1975, p. 158.
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