Editing Narseh (section)

====Background====
[[Image:N-Mesopotamia and Syria.svg|thumb|Map showing the Roman-Sasanian borders.]]
When Narseh ascended the throne, the eastern portion of Mesopotamia (since 244) and all of Armenia (since 252) were under Iranian rule.{{sfn|Weber|2016}} The notion that the western part of Armenia had been given to the [[Arsacid dynasty of Armenia|Arsacid]] prince [[Tiridates III of Armenia|Tiridates III]] has been questioned.{{sfn|Weber|2016}} According to historian Ursula Weber, "It is quite certain" that the whole of Armenia continued to be a part of the Sasanian Empire in the 3rd century, until it was later ceded to the Romans in 298/9 after the [[Peace of Nisibis (299)|Peace of Nisibis]].{{sfn|Weber|2016}} The proposition of Narseh presumably following Shapur I's expansionistic approach does not match with his testimony in the Paikuli inscription; "And Caesar and the Romans were in gratitude (?) and peace and friendship with us."{{sfn|Weber|2016}} Contrary to the testimony, however, the two empires soon clashed with each other−in 296.{{sfn|Weber|2016}} From a Roman viewpoint, the mutual relations with Iran had been heavily strained due to the aggressive and expansionistic approach of Ardashir I and Shapur I.{{sfn|Weber|2016}} However, the conclusive causes for the Roman offensive was possibly due to their territorial losses and the disadvantageous change in the sphere of authority and influence in the Mesopotamian-Armenian lands in the 240s and 250s.{{sfn|Weber|2016}}