Shatt al-Arab in the context of Abadan

Eastern Arabia, also known as Greater Bahrain or Bahrain Region (Arabic: ٱلْبَحْرَيْن, romanized: Al-Baḥrayn), is a historical region encompassing the eastern part of the Arabian Peninsula stretching from Basra to Khasab along the coast of the Persian Gulf. It includes parts of the modern-day states of Bahrain, Iraq (Basra Governorate), Kuwait, Oman, Qatar, Saudi Arabia (Eastern Province), and the United Arab Emirates. The entire coastal strip of Eastern Arabia was known as "Bahrain" for a millennium.

Until very recently, the whole of Eastern Arabia, from the Shatt al-Arab to the mountains of Oman, was a place where people moved around, settled and married unconcerned by national borders. The people of Eastern Arabia shared a culture based on the sea, as seafaring peoples.

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.

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.

The Persian Gulf, sometimes called the Arabian Gulf, is a mediterranean sea in West Asia. The body of water is an extension of the Arabian Sea and the larger Indian Ocean located between Iran and the Arabian Peninsula. It is connected to the Gulf of Oman in the east by the Strait of Hormuz. The river delta of the Shatt al-Arab forms the northwest shoreline.

The Persian Gulf has many fishing grounds, extensive reefs (mostly rocky, but also coral), and abundant pearl oysters; however, its ecology has been damaged by industrialization and oil spills.

The Iran–Iraq border runs for 1,599 km (994 mi) from the tripoint with Turkey in the north down to the Shatt al-Arab (known as Arvand Rud in Iran) waterway and out to the Persian Gulf in the south. Although the boundary was first determined in 1639, certain disputes continue, particularly surrounding navigation on the Shatt al-Arab.

Upper Mesopotamia constitutes the uplands and great outwash plain of northwestern Iraq, northeastern Syria and southeastern Turkey, in the northern Middle East. Since the early Muslim conquests of the mid-7th century, the region has been known by the traditional Arabic name of al-Jazira (Arabic: الجزيرة "the island", also transliterated Djazirah, Djezirah, Jazirah) and the Syriac variant Gāzartā or Gozarto (ܓܙܪܬܐ). The Euphrates and Tigris rivers transform Mesopotamia into almost an island, as they are joined together at the Shatt al-Arab in the Basra Governorate of Iraq, and their sources in eastern Turkey are in close proximity.

The region extends south from the mountains of Anatolia, east from the hills on the left bank of the Euphrates river, west from the mountains on the right bank of the Tigris river and includes the Sinjar plain. It extends down the Tigris to Samarra and down the Euphrates to Hit, Iraq. The Khabur runs for over 400 km (250 mi) across the plain, from Turkey in the north, feeding into the Euphrates.

Basra (Arabic: ٱلْبَصْرَة, romanized: al-Baṣrah) or Basrah is a port city in southern Iraq. It is the capital of the eponymous Basra Governorate, as well as the third largest city in Iraq overall, behind Baghdad and Mosul. Located near the Iran–Iraq border, the city is situated along the banks of the Shatt al-Arab that empties into the Persian Gulf. It is consistently one of the hottest cities in Iraq, with summer temperatures regularly exceeding 50 °C (122 °F).

Built in 636 as a military camp, Basra played an important role as a regional hub of knowledge, trade and commerce during the Islamic Golden Age and is home to the first mosque built outside the Arabian Peninsula. It was a center of the slave trade in Mesopotamia, until the Zanj rebellion in 871. Historically, Basra is one of the ports from which the fictional Sinbad the Sailor embarked on his journeys. It has experienced numerous ruling shifts. In 1258, the city was sacked by the Mongols. Basra came under Portuguese control in 1526 and later fell under the control of the Ottomans as part of the Basra Eyalet, one of the provinces comprising Ottoman Iraq. During World War I, British forces captured Basra in 1914. It was incorporated into Mandatory Iraq, under the framework Mandate for Mesopotamia after 1921, which later became the independent Kingdom of Iraq in 1932.

Al-Qurnah (Kurnah or Qurna, meaning connection/joint in Arabic) is a town in southern Iraq about 74 km northwest of Basra, that lies within the conglomeration of Nahairat. Qurna is located at the confluence point of the Tigris and Euphrates rivers to form the Shatt al-Arab waterway. Local folklore holds Qurnah to have been the original site of biblical paradise, the Garden of Eden, and location of the Tree of Knowledge.

Upper Mesopotamia constitutes the uplands and great outwash plain of northwestern Iraq, northeastern Syria and southeastern Turkey, in the northern Middle East. Since the early Muslim conquests of the mid-7th century, the region has been known by the traditional Arabic name of al-Jazira (Arabic: الجزيرة, lit. 'the island', also transliterated Djazirah, Djezirah, Jazirah) and the Syriac variant Gāzartā or Gozarto (ܓܙܪܬܐ). The Euphrates and Tigris rivers transform Mesopotamia into almost an island, as they are joined together at the Shatt al-Arab in the Basra Governorate of Iraq, and their sources in eastern Turkey are in close proximity.

The region extends south from the mountains of Anatolia, east from the hills on the left bank of the Euphrates river, west from the mountains on the right bank of the Tigris river and includes the Sinjar plain. It extends down the Tigris to Samarra and down the Euphrates to Hit, Iraq. The Khabur runs for over 400 km (250 mi) across the plain, from Turkey in the north, feeding into the Euphrates.

The Iran–Iraq War was an armed conflict between Iran and Iraq that lasted from September 1980 to August 1988. Active hostilities began with the Iraqi invasion of Iran and lasted for nearly eight years, until the acceptance of United Nations Security Council Resolution 598 by both sides. Iraq's primary rationale for the attack against Iran cited the need to prevent Ruhollah Khomeini—who had spearheaded the Iranian revolution in 1979—from exporting the new Iranian ideology to Iraq. There were also fears among the Iraqi leadership of Saddam Hussein that Iran, a theocratic state with a population predominantly composed of Shia Muslims, would exploit sectarian tensions in Iraq by rallying Iraq's Shia majority against the Baʽathist government, which was officially secular but dominated by Sunni Muslims. Iraq also wished to replace Iran as the power player in the Persian Gulf, which was not seen as an achievable objective prior to the Islamic Revolution because of Pahlavi Iran's economic and military superiority as well as its close relationships with the United States and Israel.

The Iran–Iraq War followed a long-running history of territorial border disputes between the two states, as a result of which Iraq planned to retake the eastern bank of the Shatt al-Arab that it had ceded to Iran in the 1975 Algiers Agreement. Iraqi support for Arab separatists in Iran increased following the outbreak of hostilities; Saddam disputedly may have wished to annex Iran's Arab-majority Khuzestan province.

Bubiyan Island (Arabic: جزيرة بوبيان) is the largest island in the Kuwaiti coastal island chain situated in the north-western corner of the Persian Gulf, with an area of 863 km (333 sq mi). Bubiyan Island is part of the Shatt al-Arab delta.

The Mubarak Al Kabeer Port is currently under construction on the island. As part of the port's development, there are plans for Bubiyan Island to contain power plants and substations. A 5,000-megawatt power plant has already been built in the neighbouring Kuwaiti region of Subiya.

The Karun (Persian: کارون, IPA: [kɒːˈɾuːn]), the Ancient Greek Eulaeus (Greek: Εὔλαιος or Εὐλαῖος, Hebrew Ulai (Hebrew: אולי), is the Iranian river with the highest water flow, and the country's only navigable river. It is 950 km (590 mi) long. The Karun rises in the Zard Kuh mountains of the Bakhtiari district in the Zagros Range, receiving many tributaries, such as the Dez and the Kuhrang. It passes through the city of Ahvaz, the capital of the Khuzestan Province of Iran, before emptying to its mouth into Arvand Rud.

The Karun continues toward the Persian Gulf, forking into two primary branches on its delta – the Bahmanshir and the Haffar – that join the Arvand Rud, emptying into the Persian Gulf. The important Island of Abadan is located between these two branches of the Karun. The port city of Khorramshahr is divided from the Island of Abadan by the Haffar branch.

The Al-Faw peninsula (Arabic: شبه جزيرة الفاو; also transliterated as Fao or Fawr) is a peninsula in the Persian Gulf, located in the extreme southeast of Iraq. The marshy peninsula is 20 km (12 mi) southeast of Iraq's third largest city, Basra, and is part of a delta for the Shatt al-Arab river, formed by the confluence of the major Euphrates and Tigris rivers. The al-Faw peninsula borders Iran to the northeast, with the cities of Abadan and Khorramshahr on the opposite side of the Shatt al-Arab, and Kuwait to the southwest, opposite from Bubiyan Island and Warbah Island, near the Iraqi city of Umm Qasr.

Al-Faw, the only significant town on the peninsula and its namesake, is a fishing town and port which during Saddam Hussein's presidency featured the main naval base of the Iraqi Navy. The remainder of the al-Faw peninsula is otherwise lightly inhabited, with few civilian buildings or settlements and most of its few residents involved in the fishing, oil, or shipping industries. It is the site of a number of important oil installations, most notably Iraq's two main oil tanker terminals: Khor al-Amaya and Mina al-Bakr, due to its chief importance as a strategic location controlling access to the Shatt al-Arab waterway and thus access to the port of Basra.

The Mesopotamian campaign or Mesopotamian front (Turkish: Irak Cephesi) was a campaign in the Middle Eastern theatre of World War I fought between the British Empire, with troops from Britain, Australia and the vast majority from the British Raj, and the Central Powers, primarily the Ottoman Empire, over control of Ottoman Iraq. It started after the British Fao Landing in 1914, which sought to protect Anglo-Persian Oil Company oil fields in Khuzestan province and the Shatt al-Arab waterway. The front later evolved into a larger campaign that sought to capture the city of Baghdad and divert Ottoman forces from other fronts. It ended with the Armistice of Mudros in 1918, leading to the cession of Iraq and further partition of the Ottoman Empire.

The British advanced from Al-Faw to the city of Basra to secure British oil fields in nearby Iran. Following the landings, British forces won a string of victories along the Tigris and Euphrates rivers, including the repulse of an Ottoman attempt to retake Basra at the Battle of Shaiba. The advance stalled when the British reached the town of Kut, south of the city of Baghdad in December 1915. The Siege of Kut led to the defeat of the British force, later called "the worst defeat of the Allies in World War I". The British re-organised and began a new campaign to take Baghdad. Despite fierce Ottoman resistance, Baghdad was captured in March 1917 and the Ottomans suffered more defeats until the Armistice at Mudros.

The Khuzestan Plain is the relatively flat region of Iran where the Khuzestan province and the cities of Ahvaz, Susa and Abadan are located. Khuzestan Plain borders Mesopotamia and is separated from it by the Shatt al-Arab (known as Arvand Rud in Iran) river.

The Persian Gulf, sometimes called the Arabian Gulf, is a mediterranean sea in West Asia. The body of water is an extension of the Arabian Sea and the larger Indian Ocean located between the Arabian Peninsula and Iran (Persia). It is connected to the Gulf of Oman in the east by the Strait of Hormuz. The river delta of the Shatt al-Arab forms the north-west shoreline.

The Persian Gulf has many fishing grounds, extensive reefs (mostly rocky, but also coral), and abundant pearl oysters; however, its ecology has been damaged by industrialization and oil spills.

The 1974–1975 Shatt al-Arab conflict consisted of armed cross-border clashes between Iran and Iraq. It was a major escalation of the Shatt al-Arab dispute, which had begun in 1936 due to opposing territorial claims by both countries over the Shatt al-Arab, a transboundary river that runs partly along the Iran–Iraq border. The conflict took place between April 1974 and March 1975, and resulted in over 1,000 total casualties for both sides combined, though the Iranians eventually came to hold a strategic advantage over the Iraqis. Open hostilities formally came to an end with the 1975 Algiers Agreement, in which Iraq ceded around half of the border area containing the waterway in exchange for Iran's cessation of support for Iraqi Kurdish rebels.