Editing Yazdegerd II (section)

== War with the Romans ==
[[Image:Roman-Persian Frontier in Late Antiquity.svg|thumb|Map of the [[Roman Empire|Roman]]-[[Iran]]ian frontier|280px]]
In 438, shah [[Bahram V]] ({{reign|420|438}}) died, and was succeeded by Yazdegerd II. His western neighbours, the [[Roman Empire|Romans]], had since their peace treaty with Iran in 387 agreed that both empires were obligated to cooperate in the defense of the [[Caucasus]] against nomadic attacks.{{sfn|Shayegan|2017|p=809}} The Romans helped in the defense of the Caucasus by paying the Iranians roughly 500&nbsp;lbs (226&nbsp;kg) of gold at irregular intervals.{{sfn|Payne|2015b|pp=296-298}} While the Romans saw this payment as political subsidies, the Iranians saw it as tribute, which proved that Rome was the deputy of Iran.{{sfn|Payne|2015b|p=298}} The Roman emperor [[Theodosius II]]'s unwillingness to continue the payment made Yazdegerd II [[Byzantine–Sasanian War of 440|declare war]] against the Romans,{{sfn|Payne|2015b|p=298}}{{sfn|Shayegan|2017|p=809}} which had ultimately little success for either side.{{sfn|Daryaee, "Yazdegerd II"}}

The Romans were invaded in their southern provinces by the [[Vandals]], causing Theodosius II to ask for peace and send his commander, [[Anatolius (consul)|Anatolius]], personally to Yazdegerd II's camp.{{sfn|Frye|1983|p=146}} In the ensuing negotiations in 440, both empires promised not to build any new fortifications in [[Mesopotamia]] and that the Sasanian Empire would get some payment in order to protect the Caucasus from incursions.{{sfn|Daryaee, "Yazdegerd II"}}