Human history

The ancient scholar Ptolemy of Alexandria mentions the lower Volga in his Geography (Book 5, Chapter 8, 2nd Map of Asia). He calls it the Rha, which was the Scythian name for the river. Ptolemy believed the Don and the Volga shared the same upper branch, which flowed from the Hyperborean Mountains.
The downstream of the Volga, widely believed to have been a cradle of the Proto-Indo-European civilization, was settled by Huns and other Turkic peoples in the first millennium AD, replacing Scythians.
Subsequently the river basin played an important role in the movements of peoples from Asia to Europe. A powerful polity of Volga Bulgaria once flourished where the Kama river joins the Volga, while Khazaria controlled the lower stretches of the river. Such Volga cities as Atil, Saqsin, or Sarai were among the largest in the medieval world. The river served as an important trade route connecting Scandinavia, Rus', and Volga Bulgaria with Khazaria and Persia.

Khazars were replaced by Kipchaks, Kimeks and Mongols, who founded the Golden Horde in the lower stream of Volga. Later the Empire broke into the Khanate of Kazan and Khanate of Astrakhan; subsequently they were conquered by Russians in the 16th century.
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 River.[2]
In modern times, the city on the big bend of the Volga, currently known as Volgograd, witnessed the Battle of Stalingrad, the bloodiest battle in human history.
The Russian people's deep feeling for the Volga often finds echoes in their songs and literature (see The Volga Boatmen's Song for one conspicuous example).