On 18 March 1921, the treaty ending the Polish-Bolshevik war (the so-called Treaty of Riga) was signed in Riga.
“Poles! The hour of vengeance has come. Today die or prevail! Let us go, and let your breasts be Thermopylae for your enemies!”
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.
