On 18 March 1921, the treaty ending the Polish-Bolshevik war (the so-called Treaty of Riga) was signed in Riga.
On 12 February 1833, Aleksander Czekanowski was born in Krzemieniec in Volhynia. He trained as a geologist, but was not given the freedom to pursue his career as he was sent to Siberia at the age of 30 for taking part in the January Uprising.
The first Siberian fortresses were built by Polish prisoners of war who had been taken captive by Moscow authorities precisely during the war initiated by Stefan Batory.
