The peace treaty of Nisibis was concluded between the Roman

Roman Empire

The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

 and Sassanid Persian empires at Nisibis

Nisibis

Nusaybin Nisêbîn) is a city in Mardin Province, Turkey, populated mainly by Kurds. Earlier Arameans, Arabs, and Armenians lived in the city. The population of the city is 83,832 as of 2009.-Ancient Period:...

 (now Nusaybin, Turkey

Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

) in 299. It ended the Roman–Sassanid war

Byzantine–Sassanid Wars

The Byzantine–Sassanid Wars refers to a series of conflicts between the Eastern Roman Empire and the Sassanid dynasty of the Persian Empire...

 and enforced the Roman military exploits during the conflict. Rome was acknowledged its suzerain rights over Armenia and Caucasian Iberia

Caucasian Iberia

Iberia , also known as Iveria , was a name given by the ancient Greeks and Romans to the ancient Georgian kingdom of Kartli , corresponding roughly to the eastern and southern parts of the present day Georgia...

 (in modern Georgia

Georgia (country)

Georgia is a sovereign state in the Caucasus region of Eurasia. Located at the crossroads of Western Asia and Eastern Europe, it is bounded to the west by the Black Sea, to the north by Russia, to the southwest by Turkey, to the south by Armenia, and to the southeast by Azerbaijan. The capital of...

) and received a part of Upper Mesopotamia

Mesopotamia

Mesopotamia is a toponym for the area of the Tigris–Euphrates river system, largely corresponding to modern-day Iraq, northeastern Syria, southeastern Turkey and southwestern Iran.Widely considered to be the cradle of civilization, Bronze Age Mesopotamia included Sumer and the...

 that extended even beyond the Tigris

Tigris

The Tigris River is the eastern member of the two great rivers that define Mesopotamia, the other being the Euphrates. The river flows south from the mountains of southeastern Turkey through Iraq.-Geography:...

 -including the cities of Tigranokert, Saird

Siirt

- External links :* * * *...

, Martyropolis

Martyropolis

Martyropolis was the former name of a city in Turkey, now known in Turkish as Silvan, in Aramaic as Meiafarakin .It is a Catholic titular see....

, Balalesa

Bitlis

Bitlis is a town in eastern Turkey and the capital of Bitlis Province. The town is located at an elevation of 1,400 metres, 15 km from Lake Van, in the steep-sided valley of the Bitlis River, a tributary of the Tigris. The local economy is mainly based on agricultural products which include...

, Moxos

Bakhchisaray

Bakhchisaray is a town in Central Crimea, centre of the Bakhchisaray raion , best known as the former capital of the Crimean Khanate...

, Daudia, and Arzan. Peace was thus assured for some decades until its collapse with the resurgence of Shapur II

Shapur II

Shapur II the Great was the ninth King of the Persian Sassanid Empire from 309 to 379 and son of Hormizd II. During his long reign, the Sassanid Empire saw its first golden era since the reign of Shapur I...

in the 330s.