Wars, politics & history

Peace of Riga

18 March 1921

The Peace of Riga was the treaty that ended the Polish-Soviet War, signed in the Latvian capital between Poland on one side and Soviet Russia and Soviet Ukraine on the other. After the Polish army had advanced to Kyiv and then been driven back almost to Warsaw, and Poland had won the Battle of Warsaw in 1920, the two sides agreed to a border that left large areas of western Ukraine and western Belarus under Polish rule, east of the Curzon Line. Poland abandoned the idea of a federation with an independent Ukraine and gave up Kyiv. The frontier remained in force until it was swept away by the Soviet invasion of Poland in 1939.

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