Signing of the Treaty of Riga

On 18 March 1921, the Treaty of Riga was signed by Poland, the Russian SFSR (acting also on behalf of Soviet Belarus) and the Soviet Ukraine. The Peace of Riga ended Polish-Soviet War.
The most important part of the Treaty concerned the Polish-Soviet border, which were drawn similarly to Polish-Russian border after the second partition of Poland in 1793. The border established by the Treaty remained practically unchanged until the Second World War.
Other articles of the Treaty provided for the surrender of works of art and other national treasures taken by Russia during partitions of Poland, payment of 30 mln rubbles gold restitution “on the ground of active participation of the territory of the Polish Republic in the economic life of the former Russian Empire” and the return of Polish citizens living in the Soviet Russia to Poland. Out of those resolutions, only the last one was partially fulfilled.