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20th-century conflicts

During the Russian Civil War, both sides fielded warships on the Volga. In 1918, the Red Volga Flotilla participated in driving the Whites eastward, from the Middle Volga at Kazan to the Kama and eventually to Ufa on the Belaya.

During the Civil War, Joseph Stalin ordered the imprisonment of several military specialists on a barge in the Volga and the sinking of a floating prison in which the officers perished.

During World War II, the city on the big bend of the Volga, currently known as Volgograd, witnessed the Battle of Stalingrad, possibly the bloodiest battle in human history, in which the Soviet Union and the German forces were deadlocked in a stalemate battle for access to the river. The Volga was (and still is) a vital transport route between central Russia and the Caspian Sea, which provides access to the oil fields of the Absheron Peninsula. Hitler planned to use access to the oil fields of Azerbaijan to fuel future German conquests. Apart from that, whoever held both sides of the river could move forces across the river, to defeat the enemy's fortifications beyond the river. By taking the river, Hitler's Germany would have been able to move supplies, guns, and men into the northern part of Russia. At the same time, Germany could permanently deny this transport route by the Soviet Union, hampering its access to oil and to supplies via the Persian Corridor.

For this reason, many amphibious military assaults were brought about in an attempt to remove the other side from the banks of the river. In these battles, the Soviet Union was the main offensive side, while the German troops used a more defensive stance, though much of the fighting was close quarters combat, with no clear offensive or defensive side.