The III volume of the series includes documents covering the period from the end of April 1920 to March 1921, from the attack of Polish troops on Soviet Ukraine and the intensification of hostilities against other Soviet republics (the so-called Pilsudski's Kyiv campaign) until the signing of a peace treaty in Riga, by virtue of which the war was terminated. The documents of volume V of the series cover the period from May 1926 to the end of 1932 tons. Its borders determine such events as the coup d'etat in Poland by Yu. Pilsudski in May 1926 and the conclusion of the Soviet-Polish non-aggression treaty in 1932.