Upper Mesopotamia Upper Mesopotamia Upper Mesopotamia is the name used for the uplands and great outwash plain of northwestern Iraq, northeastern Syria and southeastern Turkey, in the northern Middle East. After the Arab Islamic conquest of the mid-7th century AD the region has been known by the traditional Arabic name of al-Jazira ( "the island"), also transliterated "Djazirah", "Djezirah", "Jazirah" & the Syriac (Aramaic) variant "Gāzartā" or "Gozarto" (). 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
Mesopotamia (Roman province) full province. Next Severus embarked on a war against Parthia, which he concluded successfully with the sack of the Parthian capital Ctesiphon. In emulation of Trajan, he re-established a province of Mesopotamia in 198, with Nisibis, elevated to the status of a full "colonia", as its capital. Unlike Trajan's province, which encompassed the whole of Roman-occupied Mesopotamia between the Euphrates and Tigris rivers, the new province was limited between the province of Osroene to the south, the Euphrates and Tigris to the north, and the river Chaboras (modern Khabur) to the east. For the remainder of its existence, the new