The book reveals the historical meaning of the Soviet period as the highest stage in the national, social, cultural and economic development of the Belarusian people. The specificity of Belarusian statehood as a union statehood is emphasized, which is of fundamental importance for understanding the fateful nature of the construction of the Union State of Russia and Belarus, the Eurasian Union for strengthening the true independence of the Republic of Belarus. The historical significance of the national liberation campaign of the Red Army on September 17, 1939, as a result of which was the Polish-Panish yoke in Western Belarus was ended and the Belarusian people were reunited within the framework of a single Belarusian state. Attention is focused on the need to restore historical justice in full - to make September 17 a national holiday of the Republic of Belarus. In conclusion, it is concluded that only by following the all-Russian path can Belarusian culture and Belarusian statehood develop successfully. Designed for a wide range of readers who are sincerely interested in the true history of the Belarusian people.