The deputy director of the State Archive of the Vitebsk Region gave a lecture to students of the Vitebsk branch of MITSO on the significance of September 17 in the history of Belarus and on the unity of the Belarusian people as a fundamental factor in preserving and strengthening the sovereignty and independence of the country.

On September 17, 1939, in the context of the collapse of the Polish state and the entry of Red Army troops into the territory of Western Belarus, the final reunification of the Belarusian people took place in a single national state, which at that time was the Belarusian SSR. On November 2, 1939, the Supreme Soviet of the USSR granted requests for the inclusion of Western Belarus and Western Ukraine into the Soviet Union; on November 14, 1939, the Supreme Soviet of the BSSR adopted the Law on the inclusion of Western Belarus into the republic. Thus, the territory of Belarus regained its integrity and returned to the mainstream of the centuries-old historical tradition.

On the eve of September 17 – Day of National Unity, the deputy director of the State Archive of the Vitebsk Region gave a lecture to students of the Vitebsk branch of MITSO on the significance of September 17 in the history of Belarus and on the unity of the Belarusian people as a fundamental factor in preserving and strengthening the sovereignty and independence of the country.