Lithuanian-Polish War

Polish–Lithuanian War
Part of Lithuanian Wars of Independence Polish–Soviet War
Polish cavalry parade in Sejny
Date Lithuanian historiography: Spring 1919 – November 29, 1920; Polish historiography: September 1 – October 7, 1920 Location Suwałki Region and Vilnius Region Result Polish victory; No diplomatic relations between Poland and Lithuania until the ultimatum of 1938 Territorial changes Polish control of Suwałki and Vilnius regions
Belligerents
Poland	Lithuania
Commanders and leaders
Józef Piłsudski (Marshal of Poland) Adam Nieniewski Lucjan Żeligowski	Silvestras Žukauskas Antanas Smetona Mykolas Sleževičius

Polish victory;

Józef Piłsudski (Marshal of Poland)

Adam Nieniewski

Silvestras Žukauskas

Antanas Smetona

The Polish–Lithuanian War was an armed conflict between newly independent Lithuania and Poland in the aftermath of World War I. The conflict primarily concerned territorial control of the Vilnius Region, including Vilnius, and the Suwałki Region, including the towns of Suwałki, Augustów, and Sejny. The conflict was largely shaped by the progress in the Polish–Soviet War and international efforts to mediate at the Conference of Ambassadors and later the League of Nations. There are major differences in Polish and Lithuanian historiography regarding treatment of the war. According to Lithuanian historians, the war was part of the Lithuanian Wars of Independence and spanned from spring 1919 to November 1920. According to Poland, the war included only fighting over the Suwałki Region in September–October 1920 and was part of the Polish–Soviet War.

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