Volga in the context of Lake Seliger

The Danube (/ˈdæn.juːb/ DAN-yoob; see also other names) is a river in Europe, the second-longest after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest of Germany south through the Danube Delta in Romania into the Black Sea. A large and historically important river, it was once a frontier of the Roman Empire. In the 21st century, it connects ten European countries, running through their territories or marking a border. Originating in Germany, the Danube flows southeast for 2,850 km (1,770 mi), passing through or bordering Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova, and Ukraine. Among the many cities on the river are four national capitals: Vienna, Bratislava, Budapest, and Belgrade. Its drainage basin amounts to 817,000 km (315,000 sq mi) and extends into nine more countries.

The Danube's longest headstream, the Breg, rises in Furtwangen im Schwarzwald, while the river carries its name from its source confluence in the palace park in Donaueschingen onwards. Since ancient times, the Danube has been a traditional trade route in Europe. Today, 2,415 km (1,501 mi) of its total length are navigable. The Danube is linked to the North Sea via the Rhine–Main–Danube Canal, connecting the Danube at Kelheim with the Main at Bamberg. The river is also an important source of hydropower and drinking water.

Old Great Bulgaria (Medieval Greek: Παλαιά Μεγάλη Βουλγαρία, Palaiá Megálē Voulgaría), also often known by the Latin names Magna Bulgaria and Patria Onoguria ("Onogur land"), was a 7th-century Turkic nomadic empire formed by the Onogur-Bulgars on the western Pontic–Caspian steppe (modern southern Ukraine and southwest Russia). Great Bulgaria was originally centered between the Dniester and lower Volga.

The original capital was Phanagoria on the Taman Peninsula between the Black and Azov seas. In the mid-7th century, Great Bulgaria expanded west to include Avar territory and was centered on Poltava. During the late 7th century, however, an Avar-Slavic alliance in the west, and Khazars in the east, defeated the Bulgars, and Great Bulgaria disintegrated. Successor states are the First Bulgarian Empire and Volga Bulgaria.

The Dnieper or Dnepr (/(də)ˈniːpər/ (də-)NEE-pər), also called the Dnipro. is one of the major transboundary rivers of Europe, rising in the Valdai Hills near Smolensk, Russia, before flowing through Belarus and Ukraine to the Black Sea. Approximately 2,200 km (1,400 mi) long, with a drainage basin of 504,000 square kilometres (195,000 sq mi), it is the longest river of Ukraine and Belarus and the fourth-longest river in Europe, after the Volga, Danube, and Ural rivers.

In antiquity, the river was part of the Amber Road trade routes. During the Ruin in the later 17th century, the area was contested between the Polish–Lithuanian Commonwealth and the Russian Empire, dividing what is now Ukraine into areas described by its right and left banks. During the Soviet period, the river became noted for its major hydroelectric dams and large reservoirs. The 1986 Chernobyl disaster occurred on the Pripyat River, a tributary of the Dnieper, just upstream from its confluence with the Dnieper. The Dnieper is an important navigable waterway for the economy of Ukraine and is connected by the Dnieper–Bug Canal to other waterways in Europe. During the 2022 Russian invasion of Ukraine, certain segments of the river were made part of the defensive lines between territory controlled by the Russians and the Ukrainians.

The Ural, also known as the Yaik /ˈjaɪk/, is a river flowing through Russia and Kazakhstan in the continental border between Europe and Asia. It originates in the southern Ural Mountains and discharges into the Caspian Sea. At 2,428 kilometres (1,509 mi), it is the third-longest river in Europe after the Volga and the Danube, and the 18th-longest river in Asia. The Ural is conventionally considered part of the boundary between the continents of Europe and Asia.

The Ural rises near Mount Kruglaya in the Ural Mountains, flows south parallel and west of the north-flowing Tobol, through Magnitogorsk, and around the southern end of the Urals, through Orsk where it turns west for about 300 kilometres (190 mi), to Orenburg, where the river Sakmara joins. From Orenburg it continues west, passing into Kazakhstan, then turning south again at Oral, and meandering through a broad flat plain until it reaches the Caspian a few kilometers below Atyrau, where it forms a fine 'digitate' (tree-like) delta.

The Caspian Sea is the world's largest inland body of water, described as the world's largest lake and usually referred to as a full-fledged sea. An endorheic basin, it is situated in both Europe and Asia: east of the Caucasus, west of the broad steppe of Central Asia, south of the fertile plains of Southern Russia in Eastern Europe, and north of the mountainous Iranian Plateau. It covers a surface area of 371,000 km (143,000 sq mi) (excluding the highly saline lagoon of Garabogazköl to its east), an area approximately equal to that of Japan, with a volume of 78,200 km (19,000 cu mi). It has a salinity of approximately 1.2% (12 g/L), about a third of the salinity of average seawater. It is bounded by Kazakhstan to the northeast, Russia to the northwest, Azerbaijan to the southwest, Iran to the south, and Turkmenistan to the southeast. The name of the Caspian Sea is derived from the ancient Iranic Caspi people.

The lake stretches 1,200 km (750 mi) from north to south, with an average width of 320 km (200 mi). Its gross coverage is 386,400 km (149,200 sq mi) and the surface is about 27 m (89 ft) below sea level. Its main freshwater inflow, Europe's longest river, the Volga, enters at the shallow north end. Two deep basins form its central and southern zones. These lead to horizontal differences in temperature, salinity, and ecology. The seabed in the south reaches 1,023 m (3,356 ft) below sea level, which is the third-lowest natural non-oceanic depression on Earth after Baikal and Tanganyika lakes.

The Huns were a nomadic people who lived in Central Asia, the Caucasus, and Eastern Europe between the 4th and 6th centuries AD. According to European tradition, they were first reported living east of the Volga River, in an area that was part of Scythia at the time. By 370 AD, the Huns had arrived on the Volga, causing the westwards movement of Goths and Alans. By 430, they had established a vast, but short-lived, empire on the Danubian frontier of the Roman empire in Europe. Either under Hunnic hegemony, or fleeing from it, several central and eastern European peoples established kingdoms in the region, including not only Goths and Alans, but also Vandals, Gepids, Heruli, Suebians and Rugians.

The Huns, especially under their King Attila, made frequent and devastating raids into the Eastern Roman Empire. In 451, they invaded the Western Roman province of Gaul, where they fought a combined army of Romans and Visigoths at the Battle of the Catalaunian Fields, and in 452, they invaded Italy. After the death of Attila in 453, the Huns ceased to be a major threat to Rome and lost much of their empire following the Battle of Nedao (c. 454). Descendants of the Huns, or successors with similar names, are recorded by neighboring populations to the south, east, and west as having occupied parts of Eastern Europe and Central Asia from about the 4th to 6th centuries. Variants of the Hun name are recorded in the Caucasus until the early 8th century.

The Sarmatians (/sɑːrˈmeɪʃiənz/; Ancient Greek: Σαρμάται, romanized: Sarmátai; Latin: Sarmatae [ˈsarmatae̯]) were a large confederation of ancient Iranian equestrian nomadic peoples who dominated the Pontic steppe from about the 5th century BC to the 4th century AD.

The earliest known reference to the Sarmatians occurs in the Avesta, where they appear as Sairima-, which in later Iranian sources becomes Sarm and Salm. Originating in the central parts of the Eurasian Steppe, the Sarmatians formed part of the wider Scythian cultures. They started migrating westward around the fourth and third centuries BC, coming to dominate the closely related Scythians by 200 BC. At their greatest reported extent, around 100 BC, these tribes ranged from the Vistula River to the mouth of the Danube and eastward to the Volga, bordering the shores of the Black and Caspian seas and the Caucasus to the south.

Idel-Ural (Tatar: Идел-Урал, romanized: Idel-Ural, Russian: Идель-Урал), literally Volga-Ural, is a historical region in Eastern Europe, in what is today Russia. The name literally means Volga-Urals in the Tatar language. The frequently used Russian variant is Volgo-Uralye (Russian: Волго-Уралье). The term Idel-Ural is often used to designate 6 republics of Russia of this region: Bashkortostan, Chuvashia, Mari El, Mordovia, Tatarstan, and Udmurtia, especially in Tatar-language literature or in the context of minority languages.

Idel-Ural is at the center of the Volga Federal District (Поволжье, Povolzhye). The major religions in the region are Islam and Orthodox Christianity.

Volga Bulgaria or Volga–Kama Bulgaria (sometimes referred to as the Volga Bulgar Emirate) was a historical Bulgar state that existed between the 9th and 13th centuries around the confluence of the Volga and Kama River, in what is now European Russia. Volga Bulgaria was a multi-ethnic state with large numbers of Bulgars, Finno-Ugrians, Varangians, and East Slavs. Its strategic position allowed it to create a local trade monopoly with Norse, Cumans, and Pannonian Avars.

Bugulma-Belebey Upland (Russian: Бугульминско-Белебеевская возвышенность; Bashkir: Бөгөлмә-Бәләбәй ҡалҡыулығы; Tatar: Бөгелмә-Бәләбәй калкулыгы) is an upland in the eastern part of Eastern European Plain, west of the Urals, in Tatarstan, Bashkortostan and Orenburg Oblast, Russia. It forms the drainage divide of the Volga, Kama and Belaya rivers. The upper point of the upland is 418 m height. Romashkino field is placed there.

Lenin Volga–Don Shipping Canal (Russian: Волго-Донской судоходный канал имени В. И. Ленина, Volga-Donskoy sudokhodniy kanal imeni V. I. Lenina, abbreviated ВДСК, VDSK) is a ship canal in Russia. It connects the Volga and the Don at their closest points. Opened in 1952, its length is 101 km (63 mi), 45 km (28 mi) of which is through rivers and reservoirs.

The canal forms a part of the Unified Deep Water System of European Russia. Together with the lower Volga and the lower Don, the canal provides the shortest navigable connection between the Caspian Sea and the world's oceans via the Sea of Azov, the Black Sea, and the Mediterranean Sea.

The Don (Russian: Дон, romanized: don) is the fifth-longest river in Europe. Flowing from Central Russia to the Sea of Azov in Southern Russia, it is one of Russia's largest rivers and played an important role for traders from the Byzantine Empire.

Its basin is between the Dnieper basin to the west, the lower Volga basin immediately to the east, and the Oka basin (tributary of the Volga) to the north. Native to much of the basin were Slavic nomads.

Ural (Russian: Урал, from Bashkir: Урал, romanized: Ural) is a geographical region located around the Ural Mountains, between the East European and West Siberian plains. It is considered a part of the Eurasian Steppe, extending approximately from the North to the South; from the Arctic Ocean to the end of the Ural River near Orsk city. The border between Europe and Asia runs along the Eastern side of the Ural Mountains. Ural mostly lies within Russia but also includes a small part of Northwestern Kazakhstan. This is historical, not an official entity, with borders overlapping its Western Volga and Eastern Siberia neighboring regions. At some point in the past, parts of the currently existing Ural region were considered a gateway to Siberia, or even Siberia itself, and were combined with the Volga administrative the divisions. Today, there are two official namesake entities: the Ural Federal District and the Ural economic region. While the latter follows the historical borders, the former is a political product; the District omits Western Ural and includes Western Siberia instead.

The historical center of the Ural is Cherdyn, which is now a small town in Perm Krai.Perm was an administrative center of the gubernia with the same name by 1797. Most of the territory of historical and modern Ural was included in Perm Gubernia. The administrative center of Urals was moved to Sverdlovsk (nowadays Yekaterinburg) after the Russian Revolution and Civil War. In the present, the Ural economic region does not have an administrative and informal capital, whereas Yekaterinburg is the administrative center of the Ural Federal District.

The Caspian expeditions of the Rus' were military raids undertaken by the Rus' between the late 9th century and c. 1041 on the Caspian Sea shores, of what are nowadays Iran, Dagestan, and Azerbaijan. Initially, the Rus' appeared in Serkland in the 9th century travelling as merchants along the Volga trade route, selling furs, honey, and slaves. The first small-scale Viking raids took place in the late 9th and early 10th century. The Rus' undertook the first large-scale expedition in 913; having arrived on 500 ships, they pillaged in the Gorgan region, in the territory of present-day Iran, and more to the west, in Gilan and Mazandaran, taking slaves and goods. On their return, the northern raiders were attacked and defeated by the Khazars in the Volga Delta, and those who escaped were killed by the local tribes in the middle Volga.

During their next expedition in 943, the Rus' captured Bardha'a, the capital of Arran, in the modern-day Republic of Azerbaijan. The Rus' stayed there for several months, killing many inhabitants of the city and amassing substantial plunder. It was only an outbreak of dysentery among the Rus' that forced them to depart with their spoils. Sviatoslav, prince of Kiev, commanded the next attack, which destroyed the Khazar state in 965. Sviatoslav's campaign established the Rus's hold on the north-south trade routes, helping to alter the demographics of the region. Raids continued through the time period with the last Scandinavian attempt to reestablish the route to the Caspian Sea taking place in c. 1041 by Ingvar the Far-Travelled.

The Dnieper or Dnepr (/(də)ˈniːpər/ (də-)NEE-pər), also called the Dnipro, is one of the major transboundary rivers of Europe, rising in the Valdai Hills near Smolensk, Russia, before flowing through Belarus and Ukraine to the Black Sea. Approximately 2,200 km (1,400 mi) long, with a drainage basin of 504,000 square kilometres (195,000 sq mi), it is the longest river of Ukraine and Belarus and the fourth-longest river in Europe, after the Volga, Danube, and Ural rivers.

In antiquity, the river was part of the Amber Road trade routes. During the Ruin in the later 17th century, the area was contested between the Polish–Lithuanian Commonwealth and the Russian Empire, dividing what is now Ukraine into areas described by its right and left banks. During the Soviet period, the river became noted for its major hydroelectric dams and large reservoirs. The 1986 Chernobyl disaster occurred on the Pripyat River, a tributary of the Dnieper, just upstream from its confluence with the Dnieper. The Dnieper is an important navigable waterway for the economy of Ukraine and is connected by the Dnieper–Bug Canal to other waterways in Europe. During the 2022 Russian invasion of Ukraine, certain segments of the river were made part of the defensive lines between territory controlled by the Russians and the Ukrainians.

Ivan IV Vasilyevich (Russian: Иван IV Васильевич; 25 August [O.S. 15 August] 1530 – 28 March [O.S. 18 March] 1584), commonly known as Ivan the Terrible, was Grand Prince of Moscow and all Russia from 1533 to 1547, and the first Tsar and Grand Prince of all Russia from 1547 until his death in 1584. Ivan's reign was characterised by Russia's transformation from a medieval state to a fledgling empire, but at an immense cost to its people and long-term economy.

Ivan IV was the eldest son of Vasili III by his second wife Elena Glinskaya, and a grandson of Ivan III. He succeeded his father after his death, when he was three years old. A group of reformers united around the young Ivan, crowning him as tsar in 1547 at the age of 16. In the early years of his reign, Ivan ruled with the group of reformers known as the Chosen Council and established the Zemsky Sobor, a new assembly convened by the tsar. He also revised the legal code and introduced reforms, including elements of local self-government, as well as establishing the first Russian standing army, the streltsy. Ivan conquered the khanates of Kazan and Astrakhan, bringing the entire length of the Volga river under Russian control.

Volgograd, formerly Tsaritsyn (1589–1925) and Stalingrad (1925–1961), is the largest city and the administrative centre of Volgograd Oblast, Russia. The city lies on the western bank of the Volga, covering an area of 859.4 square kilometres (331.8 square miles), with a population of slightly over one million residents. Volgograd is the 16th-largest city by population size in Russia, the third-largest city of the Southern Federal District, and the fourth-largest city on the Volga.

The city was founded as the fortress of Tsaritsyn in 1589. By the 19th century, Tsaritsyn had become an important river-port and commercial centre, leading to its rapid population growth. In November 1917, at the start of the Russian Civil War, Tsaritsyn came under Bolshevik control. It fell briefly to the White Army in mid-1919 but returned to Bolshevik control in January 1920. In 1925, the city was renamed Stalingrad in honor of Joseph Stalin, who took part in defending the city against the White Army who had then ruled the country. During World War II, Axis forces attacked the city, leading to the Battle of Stalingrad, the largest and bloodiest battle in World War II, from which it received the title of Hero City. The Soviet victory at Stalingrad is widely held to be the turning point of World War II, leading to the destruction of the German army in the East. In 1961, Nikita Khrushchev's administration renamed the city to Volgograd as part of de-Stalinization.

Nizhny Novgorod (/ˌnɪʒni ˈnɒvɡərɒd/ NIZH-nee NOV-gə-rod; Russian: Нижний Новгород, IPA: [ˈnʲiʐnʲɪj ˈnovɡərət] , lit. 'Lower Newtown') is both a city and the administrative centre of Nizhny Novgorod Oblast and the Volga Federal District in Russia. The city is located at the confluence of the Oka and the Volga rivers in Central Russia, with a population of over 1.2 million residents, and roughly 1.7 million residents in the wider urban area. Nizhny Novgorod is the sixth-largest city in Russia, and the second-most populous city on the Volga and Volga Federal District. The city is located 420 kilometers (260 mi) east of Moscow. It is an important economic, architectural, educational and cultural centre in Russia and the Volga-Vyatka Economic Region, and provides the majority of Russia's river tourism.

The city was founded on 4 February 1221 by Prince George II of Vladimir. In 1612, Kuzma Minin and Prince Dmitry Pozharsky organized an army for the liberation of Moscow from the Poles and Lithuanians. In 1817, Nizhny Novgorod became a great trade centre of the Russian Empire. In 1896, at the trade centre, an All-Russia Exhibition was organized. During the Soviet period, the city turned into an important industrial centre, and was known as Gorky. In particular, the Gorky Automobile Plant was constructed in this period. Around this time, the city was given the nickname "Russian Detroit". Shortly before the dissolution of the Soviet Union the city was renamed Nizhny Novgorod once again. In 1985, the Nizhny Novgorod Metro was opened. In 2016, Vladimir Putin opened the new 70th Anniversary of Victory Plant, which is part of the Almaz-Antey Air and Space Defence Corporation.