On this day 83 years ago, on June 27, 1942 (the 14th day of the fifth lunar month), German troops crossed the Don River to attack the Caucasus oil fields.

June 27, 1942. German troops, attempting to capture the Caucasus oil fields and Kuangqu, began to advance towards southern Russia and build bridgeheads across the Don River. However, the army paid a high price. The Russians claim that the Don River has been dyed red with German blood and that they have become victims of fierce attacks by Russian bombers and tanks.

The German army invested in five army groups and was supported by the Italian, Romania and Hungarian armies. However, if the German army wanted to occupy this oil base, it would have to make greater sacrifices. If Hitler was to win, he had to learn to trust his generals and accept their estimates of the strength of the Russian army.