Galerius' Sasanian campaigns

Sassanid campaigns of Galerius
	Part of the Roman–Persian Wars
	; Detail of Galerius attacking Narseh on the Arch of Galerius at Thessaloniki, Greece, the city where Galerius carried out most of his administrative actions.
Date	293 (?) AD / 296–298 AD
Location	Armenia and Mesopotamia
Result	Roman victory; Treaty of Nisibis The Sasanians pay up 400,000 denarii to Rome;
Belligerents
Roman Empire	Sasanian Empire
Commanders and leaders
Galerius; Diocletian	Shah Narseh (WIA)
Strength
25,000 men in Armenia	40,000 men

The Sasanian campaigns of Galerius were a series of military expeditions which saw the Romans and the Persian Sassanids clash, which were part of a war that lasted overall from 296 to 298 AD, which culminated in the Battle of Satala. With his accession to the throne Narseh had clearly expressed his intention to break the peace treaty signed in 287 between Diocletian and Vahram II, which had put an end to sixty years of wars between the Persians and the Romans, began with the rise of the new Sasanian dynasty of Artaxerxes.

According to Eutropius, the campaign had already begun in 293, with the invasion of the Roman province of Syria, but it was only in 296 that the caesar Galerius, received from Diocletian (intended to quell a revolt in Egypt) the task of undertaking a military campaign against the Sassanid ruler Narseh, who ascended the throne three years earlier.