The Battle of Daugavpils, or Battle of Dyneburg, or Operation Winter was the final battle during the Polish–Soviet War of 1919. A joint Polish and Latvian force, operating under Polish Staff orders known as "Operation Winter", attacked the Red Army garrison in Dunaburg, or Daugavpils, from 3 to 5 January 1920.
From the Polish perspective, the battle was part of the Polish–Soviet War. In Latvia, it is considered to be part of Latvian War of Independence.
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