The Great Unknown War. A documentary by Andrei Medvedev, 2020 (English subtitiles)

It is assumed in our historiography that the USSR and its allies – the United States, Britain and France – fought with Nazi Germany, which was supported by its allies – Hungary, Romania, Italy, and Japan. And the Soviet Union won this unbearably difficult war. But it is very important to understand whether our allies were really sincere, on whose side were the so-called neutral countries, and why the war on the Eastern front was so violent with mass destruction of the population. Without understanding who brought Hitler to power, who financed him, who earned money from the war, we will never realize the greatness of the feat of the Soviet people. Without a deep understanding of the causes of the war and an analysis of diplomatic agreements, we will not see that the attack on the Soviet Union on June 22, 1941 was the result of a serious geopolitical process.