The Roman Empire was at its widest extent, including Dacia, Mesopotamia, Armenia and Assyria, under which Emperor?
Assyria (Roman province) Assyria (Roman province) Assyria () was reputedly a Roman province that lasted only two years (116–118 AD). According to Eutropius and Festus, who in the second half of the 4th century historians, at a time when the Roman emperor Trajan was perceived as "a valuable paradigm for contemporary events and figures", wrote under the direction of the Emperor Valens, Assyria was one of three provinces (with Armenia and Mesopotamia) created by Trajan in AD 116 following a successful military campaign against Parthia that in that year saw him cross the River Tigris from Mesopotamia and take possession, in spite of
Armenia time east of the Roman Republic. In the next centuries, Armenia was in the Persian Empire's sphere of influence during the reign of Tiridates I, the founder of the Arsacid dynasty of Armenia, which itself was a branch of the Parthian Empire. Throughout its history, the kingdom of Armenia enjoyed both periods of independence and periods of autonomy subject to contemporary empires. Its strategic location between two continents has subjected it to invasions by many peoples, including Assyria (under Ashurbanipal, at around 669–627 BC, the boundaries of Assyria reached as far as Armenia and the Caucasus Mountains), Medes, Achaemenid Empire,