Valens was Roman emperor from 364 to 378. Following a largely unremarkable military career, he was named co-emperor by his elder brother Valentinian I, who gave him the eastern half of the Roman Empire to rule. In 378, Valens was defeated and killed at the Battle of Adrianople against the invading Goths, which astonished contemporaries and marked the beginning of barbarian encroachment into Roman territory.
Yazdegerd I was the Sasanian King of Kings of Iran from 399 to 420. A son of Shapur III, he succeeded his brother Bahram IV after the latter's assassination.
Bahram II was the fifth Sasanian King of Kings (shahanshah) of Iran, from 274 to 293. He was the son and successor of Bahram I. Bahram II, while still in his teens, ascended the throne with the aid of the powerful Zoroastrian priest Kartir, just like his father had done.
Shapur I was the second Sasanian King of Kings of Iran. The precise dating of his reign is disputed, but it is generally agreed that he ruled from 240 to 270, with his father Ardashir I as co-regent until the death of the latter in 242. During his co-regency, he helped his father with the conquest and destruction of the city of Hatra, whose fall was facilitated, according to Islamic tradition, by the actions of his future wife al-Nadirah. Shapur also consolidated and expanded the empire of Ardashir I, waged war against the Roman Empire, and seized its cities of Nisibis and Carrhae while he was advancing as far as Roman Syria. Although he was defeated at the Battle of Resaena in 243 by Roman emperor Gordian III, he was the following year able to win the Battle of Misiche and force the new Roman emperor Philip the Arab to sign a favorable peace treaty that was regarded by the Romans as "a most shameful treaty".
Shapur II, also known as Shapur the Great, was the tenth Sasanian King of Kings (Shahanshah) of Iran. He took the title at birth and held it until his death at age 70, making him the longest-reigning monarch in Iranian history. He was the son of Hormizd II.
Ardashir II, was the Sasanian King of Kings of Iran from 379 to 383. He was the brother of his predecessor, Shapur II, under whom he had served as vassal king of Adiabene, where he fought alongside his brother against the Romans. Ardashir II was appointed as his brother's successor to rule interimly till the latter's son Shapur III reached adulthood. Ardashir II's short reign was largely uneventful, with the Sasanians unsuccessfully trying to maintain rule over Armenia.
Jovian was Roman emperor from June 363 to February 364. As part of the imperial bodyguard, he accompanied Julian on his campaign against the Sasanian Empire. Julian was killed in battle, and the exhausted and ill-provisioned army declared Jovian his successor. Unable to cross the Tigris, Jovian made peace with the Sasanids on humiliating terms. He spent the rest of his seventh-month reign traveling back to Constantinople. After his arrival at Edessa, Jovian was petitioned by bishops over doctrinal issues concerning Christianity. Albeit the last emperor to rule the whole Empire during his entire reign, he died at Dadastana, never having reached the capital.
Al-Hira was an ancient city in Mesopotamia located south of what is now Kufa in south-central Iraq.
The Battle of Ctesiphon took place on 29 May 363 between the armies of Roman Emperor Julian and an army of the Sasanian Empire outside the walls of the Persian capital Ctesiphon. The battle was a Roman victory, but eventually the Roman forces found themselves unable to continue their campaign as they were too far from their supply lines.
Mushegh I Mamikonian was an Armenian military officer from the Mamikonian family who occupied the hereditary office of sparapet (generalissimo) of the Kingdom of Armenia under the Arsacid kings Pap and Varazdat. He took part in the Armenian resistance against the forces of the Sasanian monarch Shapur II, notably taking part in the Battle of Bagavan, where the Iranian forces were defeated. He was the regent of Armenia under the young and inexperienced Varazdat, who eventually suspected him of posing a danger to his rule, and thus had him executed, in 377/8.
War elephants were used in Iranian military history, most notably in Achaemenid, Seleucid, and Sasanian periods. These were Asian elephants recruited from the southern provinces of Iran and India, but also possibly Syrian elephants from Syria and western Iran.
Merena was a 4th-century Iranian military officer active during the reign of the Sasanian king (shah) Shapur II. According to the Iranologist Touraj Daryaee, Merena's real name may have been Mihrān, thus making him a member of the House of Mihran, one of the Seven Great Houses of Iran. He was a cavalry commander in the Sasanian army in the course of the Roman-Persian Wars soon after the Battle of Ctesiphon in 363, which took place outside the Sasanian capital Ctesiphon in the province of Asoristan. As cavalry commander, he also appeared in the Battle of Maranga.
Flavius Arintheus was a Roman army officer who started his career in the middle ranks and rose to senior political and military positions. He served the emperors Constantius II, Julian, Jovian and Valens. In 372 he was appointed consul, alongside Domitius Modestus.
Victor was a Roman military officer and politician, who served the emperors Constantius II, Julian, Jovian and Valens. He was appointed consul in AD 369, alongside Valentinianus Galates.
Julian's Persian expedition began in March 363 AD and was the final military campaign of the Roman emperor Julian. The Romans fought against the Sasanian Empire, ruled at the time by Shapur II.
The Peace Treaty of 363 between the Eastern Roman Empire and the Sasanian Empire was the subsequent treaty from Emperor Julian's Persian expedition. Upon Julian's death, the newly elected Emperor Jovian was forced into signing a humiliating treaty by which territorial and diplomatic concessions were given to the Sasanians.
The Battle of Maranga occurred in 363, shortly after the Battle of Ctesiphon. The Romans repelled a Sasanian attack while sustaining minimal losses. However, the army's lack of supplies continued to threaten the army, and soon afterwards the emperor Julian was killed at the Battle of Samarra.
The Perso-Roman wars of 337–361 were a series of military conflicts fought between the Roman Empire and the Sasanian Empire between 337 and 361. They were a result of long-standing competition between the rival powers over influence in the border kingdoms of Armenia and Iberia, as well as the desire of Shapur II, after his Arab campaign, to revoke the unfavorable terms of the Treaty of Nisibis, which had concluded the previous war between the empires. Though the Romans under Constantius II were defeated in several sanguinary encounters, Shapur was unable to secure a decisive victory.
Shapur was an Iranian prince, who was the penultimate King of Persis from 207–210 to 211/2. He was succeeded by his younger brother Ardashir I, who founded the Sasanian Empire.
Surena was a 4th-century Iranian military officer active during the reign of the Sasanian king (shah) Shapur II. He played an important role in the denial of the Roman invasion in 363 and the peace negotiations that followed.
