Tigris in the context of "Shatt al-Arab"

Iraq, officially the Republic of Iraq, is a country in West Asia. Located within the geo-political region of the Middle East, it is bordered by Saudi Arabia to the south, Turkey to the north, Iran to the east, the Persian Gulf and Kuwait to the southeast, Jordan to the southwest, and Syria to the west. The country covers an area of 438,317 square kilometres (169,235 sq mi) and has a population of over 46 million, making it the 58th largest country by area and the 31st most populous in the world. Baghdad, home to over 8 million people, is the capital city and the largest in the country.

Starting in the 6th millennium BC, the fertile plains between Iraq's Tigris and Euphrates rivers, referred to as Mesopotamia, fostered the rise of early cities, civilisations, and empires including Sumer, Akkad, Babylonia, and Assyria. Known as the cradle of civilisation, Mesopotamia saw the invention of writing systems, mathematics, navigation, timekeeping, a calendar, astrology, the wheel, the sailboat, and a law code. After the Muslim conquest of Mesopotamia, Baghdad became the capital of the Abbasid Caliphate and a global cultural and intellectual hub during the Islamic Golden Age, home to institutions such as the House of Wisdom. Following Baghdad's destruction by the Mongols in 1258, Iraq came under successive empires and, from the 16th century until the 20th century, was governed within the Ottoman system as a defined region known administratively as ‘the Iraq Region’. Additionally, Iraq holds religious significance in Christianity, Judaism, Yazidism, and Mandaeism.

Sumer (/ˈsuːmər/) is the earliest known civilization, located in the historical region of southern Mesopotamia (now south-central Iraq), emerging during the Chalcolithic and early Bronze Ages between the sixth and fifth millennium BC. Like nearby Elam, it is one of the cradles of civilization, along with Egypt, the Indus Valley, the Erligang culture of the Yellow River valley, Caral-Supe, and Mesoamerica. Living along the valleys of the Tigris and Euphrates rivers, Sumerian farmers grew an abundance of grain and other crops, a surplus of which enabled them to form urban settlements. The world's earliest known texts come from the Sumerian cities of Uruk and Jemdet Nasr, and date to between c. 3350 – c. 2500 BC, following a period of proto-writing c. 4000 – c. 2500 BC.

The Tigris–Euphrates river system is a large river system in West Asia that flows into the Persian Gulf. Its primary rivers are the Tigris and Euphrates, along with smaller tributaries.

From their sources and upper courses in the Armenian highlands of eastern Turkey, being Lake Hazar for the Tigris and Karasu along with the Murat River for the Euphrates, the two rivers descend through valleys and gorges to the uplands of Syria and northern Iraq and then to the alluvial plain of central Iraq. Other tributaries join the Tigris from sources in the Zagros Mountains to the east. The rivers flow in a south-easterly direction through the central plain and combine at Al-Qurnah to form the Shatt al-Arab and discharge into the Persian Gulf. The rivers and their tributaries drain an area of 879,790 square kilometres (339,690 sq mi), including almost the entire area of Iraq as well as portions of Turkey, Syria, Iran and Kuwait.

Lucius Septimius Severus (/səˈvɪərəs/; Latin: [ˈɫuːkiʊs sɛpˈtɪmiʊs sɛˈweːrʊs]; 11 April 145 – 4 February 211) was Roman emperor from 193 to 211. He was born in Leptis Magna, Libya in the Roman province of Africa. As a young man he advanced through the customary succession of offices under the reigns of Marcus Aurelius and Commodus. Severus was the final contender to seize power after the death of the emperor Pertinax in 193 during the Year of the Five Emperors.

After deposing and killing the incumbent emperor Didius Julianus, Severus fought his rival claimants, the Roman generals Pescennius Niger and Clodius Albinus. Niger was defeated in 194 at the Battle of Issus in Cilicia. Later that year Severus waged a short punitive campaign beyond the eastern frontier, annexing the Kingdom of Osroene as a new province. Severus defeated Albinus three years later at the Battle of Lugdunum in Gaul. Following the consolidation of his rule over the western provinces, Severus waged another brief, more successful war in the east against the Parthian Empire, sacking their capital Ctesiphon in 197 and expanding the eastern frontier to the Tigris. He then enlarged and fortified the Limes Arabicus in Arabia Petraea. In 202, he campaigned in Africa and Mauretania against the Garamantes, capturing their capital Garama, and expanding the Limes Tripolitanus along the southern desert frontier of the empire.

The Taurus Mountains (Turkish: Toros Dağları or Toroslar) are a mountain complex in southern Turkey, separating the Mediterranean coastal region from the central Anatolian Plateau. The system extends along a curve from Lake Eğirdir in the west to the upper reaches of the Euphrates and Tigris rivers in the east. It is a part of the Alpide belt in Eurasia.

The Euphrates (/juːˈfreɪtiːz/ yoo-FRAY-teez; see below) is the longest and one of the most historically important rivers of West Asia. Together with the Tigris, it is one of the two defining rivers of Mesopotamia (lit. 'the land between the rivers'). Originating in Turkey, the Euphrates flows through Syria and Iraq to join the Tigris in the Shatt al-Arab in Iraq, which empties into the Persian Gulf.

The Euphrates is the fifteenth-longest river in Asia and the longest in West Asia, at about 2,780 km (1,730 mi), with a drainage area of 440,000 km (170,000 sq mi) that covers six countries.

Shubria or Shupria was a kingdom in the southern Armenian highlands, known from Assyrian sources in the first half of the 1st millennium BC. It was located north of the upper Tigris River and to the southwest of Lake Van, extending eastwards to the frontiers of Urartu. It appears in the 1st millennium BC as an independent kingdom, succeeding the people earlier called Shubaru in Assyrian sources in the later centuries of the 2nd millennium BC. It was located between the powerful states of Assyria and Urartu and came into conflict with both. It was conquered by Assyria in 673–672 BC but likely regained its independence towards the end of the 7th century BC with the collapse of Assyrian power.

Some scholars have concluded from the Hurrian etymology of some Shubrian names that Shubria was mainly populated by Hurrians. Some have suggested that it was the last remnant of Hurrian civilization, or even constituted the original homeland of the Hurrians. However, other Shubrian names have been identified as Aramean by origin. Bradley J. Parker writes that the existing evidence indicates that Shubria had a heterogeneous population including Hurrians, Arameans, and likely also Urartians, Assyrians and others. According to some scholars, Shubria was inhabited, at least in part, by speakers of the Proto-Armenian language and played an important role in the formation of the later Armenian state and ethnic group.

The Parthian Empire (/ˈpɑːrθiən/), also known as the Arsacid Empire (/ˈɑːrsəsɪd/), was a major Iranian political and cultural power centered in ancient Iran from 247 BC to 224 AD. Its latter name comes from its founder, Arsaces I, who led the Parni tribe in conquering the region of Parthia in Iran's northeast, then a satrapy (province) under Andragoras, who was rebelling against the Seleucid Empire. Mithridates I (r. c. 171 – 132 BC) greatly expanded the empire by seizing Media and Mesopotamia from the Seleucids. At its height, the Parthian Empire stretched from the northern reaches of the Euphrates, in what is now central-eastern Turkey, to present-day Afghanistan and western Pakistan. The empire, located on the Silk Road trade route between the Roman Empire in the Mediterranean Basin and the Han dynasty of China, became a center of trade and commerce.

The Parthians largely adopted the art, architecture, religious beliefs, and regalia of their culturally heterogeneous empire, which encompassed Persian, Hellenistic, and regional cultures. For about the first half of its existence, the Arsacid court adopted elements of Greek culture, though it eventually saw a gradual revival of Iranian traditions. The Arsacid rulers were titled "King of Kings", claiming inheritance of the Achaemenid Empire; indeed, they accepted many local kings as vassals, although the Achaemenids would have had centrally appointed, albeit largely autonomous, satraps. The court did appoint a small number of satraps, largely outside Iran, but these satrapies were smaller and less powerful than the Achaemenid potentates. With the expansion of Arsacid power, the seat of central government shifted from Nisa to Ctesiphon along the Tigris (south of Baghdad), although several other sites also served as capitals.

Baghdad is the capital and largest city in Iraq. It is located on the banks of the Tigris in central Iraq. The city has an estimated population of 8 million. It ranks among the most populous and largest cities in the Middle East and the Arab world and constitutes 22% of the country's population. Baghdad is a primary financial and commercial center in the region.

Founded in 762 AD by Al-Mansur, Baghdad was the capital of the Abbasid Caliphate and became its most notable development project. The city evolved into an intellectual and cultural center. This, in addition to housing several key academic institutions, including the House of Wisdom, as well as a multi-ethnic and multi-religious environment, garnered it a worldwide reputation as the "Center of Learning". For much of the Abbasid era, during the Islamic Golden Age, Baghdad was one of the largest cities in the world and rivaled Chang'an, as the population peaked at more than one million. It was largely destroyed at the hands of the Mongol Empire in 1258, resulting in a decline that would linger through many centuries due to frequent plagues, shift in power and multiple successive empires. Later, Baghdad served as the administrative center of Ottoman Iraq, exercising authority over the provinces of Basra, Mosul, and Shahrizor.