Mesopotamia incorporating not only parts of Syria but also almost all of Iraq and southeastern Turkey. The neighbouring steppes to the west of the Euphrates and the western part of the Zagros Mountains are also often included under the wider term Mesopotamia. A further distinction is usually made between Northern or Upper Mesopotamia and Southern or Lower Mesopotamia. Upper Mesopotamia, also known as the "Jazira", is the area between the Euphrates and the Tigris from their sources down to Baghdad. Lower Mesopotamia is the area from Baghdad to the Persian Gulf and includes Kuwait and parts of western Iran. In modern
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