Julius Nepos vs Yazdegerd II

The Eastern Roman Emperor Leo I recognized Julius Nepos as the legitimate Western Roman Emperor, sending him to Italy with military support to depose the usurper Glycerius. This established Nepos as the last emperor recognized by both halves of the empire.

The magister militum Orestes rebelled against Julius Nepos, forcing him to flee from Ravenna to Dalmatia. Orestes then installed his own son Romulus Augustulus as emperor, though Nepos continued to claim legitimacy from his exile.

Julius Nepos was murdered by his own soldiers in his villa near Salona, Dalmatia. His death ended the line of legitimate Western Roman emperors recognized by the Eastern court, and the Eastern Emperor Zeno formally abolished the separate Western imperial title.

Yazdegerd II launched a military campaign against the Byzantine Empire, attacking Roman territories in Mesopotamia. The war ended inconclusively after a few years, with both sides agreeing to a truce that maintained the status quo.

Yazdegerd II issued an edict demanding that the Christian population of Armenia convert to Zoroastrianism. This sparked widespread resistance and rebellion among the Armenian nobility and clergy, leading to the Battle of Avarayr in 451 AD.

Yazdegerd II's forces defeated the Armenian rebel army led by Vartan Mamikonian at the Battle of Avarayr. Although the Sasanians won militarily, the battle became a symbol of Armenian resistance, and Yazdegerd later granted religious concessions.