The Roman–Parthian War of 161–166 (also called the Parthian War of Lucius Verus) was fought between the Roman and Parthian Empires over Armenia and Upper Mesopotamia. It concluded in 166 after the Romans made successful campaigns into Lower Mesopotamia and Media and sacked Ctesiphon, the Parthian capital.
Origins to Lucius' dispatch, 161–162
On his deathbed in the spring of 161, Emperor Antoninus Pius had spoken of nothing but the state and the foreign kings who had wronged him. One of those kings, Vologases IV of Parthia, made his move in late summer or early autumn 161. Vologases entered the Kingdom of Armenia (then a Roman client state), expelled its king and installed his own—Pacorus, an Arsacid like himself. At the time of the invasion, the governor of Syria was Lucius Attidius Cornelianus. Attidius had been retained as governor even though his term had ended in 161, presumably to avoid giving the Parthians the chance to wrong-foot his replacement. The governor of Cappadocia, the front-line in all Armenian conflicts, was Marcus Sedatius Severianus, a Gaul with much experience in military matters. But living in the east had a deleterious effect on his character.
Alexander of Abonutichus, a prophet who carried a snake named Glycon around with him, had enraptured Severianus, as he had many others. Father-in-law to the respected senator Publius Mummius Sisenna Rutilianus, then-proconsul of Asia, Alexander was friends with many members of the east Roman elite. Alexander convinced Severianus that he could defeat the Parthians easily, and win glory for himself. Severianus led a legion (perhaps the IX Hispana) into Armenia, but was trapped by the great Parthian general Chosrhoes at Elegeia, a town just beyond the Cappadocian frontiers, past the headwaters of the Euphrates. Severianus made some attempt to fight Chosrhoes, but soon realized the futility of his campaign, and committed suicide. His legion was massacred, with around 5,000–6,000 Romans killed. The campaign had only lasted three days.
There was threat of war on other frontiers as well—in Britain, and in Raetia and Upper Germany, where the Chatti of the Taunus mountains had recently crossed over the limes. Marcus Aurelius, who had become emperor on Pius' death on 7 March 161, was unprepared. Pius seems to have given him no military experience; the Historia Augusta states that Marcus spent the whole of Pius' twenty-three-year reign at the emperor's side, and not in the provinces where most previous emperors had spent their early careers. Marcus sent Marcus Statius Priscus to replace Severianus as governor of Cappadocia, while Sextus Calpurnius Agricola took Priscus' place as governor of Britain.
More bad news arrived: Attidius Cornelianus' army had been defeated in battle against the Parthians, and retreated in disarray. Reinforcements were dispatched for the Parthian frontier. Publius Julius Geminius Marcianus, an African senator commanding X Gemina at Vindobona (Vienna), left for Cappadocia with vexillations from the Danubian legions. Three full legions were also sent east: I Minervia from Bonn in Upper Germany, II Adiutrix from Aquincum, and V Macedonica from Troesmis. The northern frontiers were strategically weakened; frontier governors were told to avoid conflict wherever possible. Attidius Cornelianus himself was replaced by M. Annius Libo, Marcus' first cousin. He was young—his first consulship was in 161, so he was probably in his early thirties—and, as a mere patrician, lacked military experience. Marcus had chosen a reliable man rather than a talented one.
Marcus took a four-day public holiday at Alsium, a resort town on the Etrurian coast. He was too anxious to relax. Writing to his former tutor Marcus Cornelius Fronto, he declared that he would not speak about his holiday. Fronto replied ironically: "What? Do I not know that you went to Alsium with the intention of devoting yourself to games, joking and complete leisure for four whole days?" He encouraged Marcus to rest, calling on the example of his predecessors (Pius had enjoyed exercise in the palaestra, fishing, and comedy), going so far as to write up a fable about the gods' division of the day between morning and evening—Marcus had apparently been spending most of his evenings on judicial matters instead of leisure. Marcus could not take Fronto's advice. "I have duties hanging over me that can hardly be begged off," he wrote back. Marcus put on Fronto's voice to chastise himself: "'Much good has my advice done you', you will say!" He had rested, and would rest often, but "—this devotion to duty! Who knows better than you how demanding it is!"
Fronto sent Marcus a selection of reading material, including Cicero's pro lege Manilia, in which the orator had argued in favor of Pompey taking supreme command in the Mithridatic War. It was an apt reference (Pompey's war had taken him to Armenia), and may have had some impact on the decision to send Lucius to the eastern front. "You will find in it many chapters aptly suited to your present counsels, concerning the choice of army commanders, the interests of allies, the protection of provinces, the discipline of the soldiers, the qualifications required for commanders in the field and elsewhere [...]" To settle his unease over the course of the Parthian war, Fronto wrote Marcus a long and considered letter, full of historical references. In modern editions of Fronto's works, it is labeled De bello Parthico (On the Parthian War). There had been reverses in Rome's past, Fronto writes, at Allia, at Caudium, at Cannae, at Numantia, Cirta, and Carrhae; and under Trajan (against the Dacians and the Parthians), Hadrian (against the Jews and the Britons), and again under Pius; but, in the end, Romans had always prevailed over their enemies: "always and everywhere [Mars] has changed our troubles into successes and our terrors into triumphs".
Lucius' dispatch and journey east, 162–163?
Over the winter of 161–62, as more bad news arrived—a rebellion was brewing in Syria—it was decided that Lucius should direct the Parthian war in person. He was stronger and healthier than Marcus, the argument went, more suited to military activity. Lucius' biographer suggests ulterior motives: to restrain Lucius' debaucheries, to make him thrifty, to reform his morals by the terror of war, to realize that he was an emperor. Whatever the case, the senate gave its assent, and Lucius left. Marcus would remain in Rome; the city "demanded the presence of an emperor".
Titus Furius Victorinus, one of the two praetorian prefects, was sent with Lucius, as were a pair of senators, Marcus Pontius Laelianus Larcius Sabinus and Marcus Iallius Bassus, and a detachment of the Praetorian Guard. Victorinus had previously served as procurator of Galatia, giving him some experience with eastern affairs. Moreover, he was far more qualified than his praetorian partner, Sextus Cornelius Repentinus, who was said to owe his office to the influence of Pius' mistress Galeria Lysistrate. Repentius had the rank of a senator, but no real access to senatorial circles—his was merely a decorative title. Since a prefect had to accompany the Guard, Victorinus was the clear choice.
Laelianus had been governor of both Pannonias and governor of Syria in 153; hence he had first-hand knowledge of the eastern army and military strategy on the frontiers. He was made comes Augustorum ("companion of the emperors") for his service. Laelianus was, in the words of Fronto, "a serious man and an old-fashioned disciplinarian". Bassus had been governor of Lower Moesia, and was also made comes. Lucius selected his favorite freedmen, including Geminus, Agaclytus, Coedes, Eclectus, and Nicomedes, who gave up his duties as praefectus vehiculorum to run the commissariat of the expeditionary force. The fleet of Misenum was charged with transporting the emperor and general communications and transport.
Lucius left in the summer of 162 to take a ship from Brundisium; Marcus followed him as far as Capua. Lucius feasted himself in the country houses along his route, and hunted at Apulia. He fell ill at Canosa, probably afflicted with a mild stroke, and took to bed. Marcus made prayers to the gods for his safety in front of the senate, and hurried south to see him. Fronto was upset at the news, but was reassured when Lucius sent him a letter describing his treatment and recovery. In his reply, Fronto urged his pupil to moderate his desires, and recommended a few days of quiet bedrest. Lucius was better after three days' fasting and a bloodletting. It was probably only a mild stroke.
Verus continued eastward via Corinth and Athens, accompanied by musicians and singers as if in a royal progress. At Athens he stayed with Herodes Atticus, and joined the Eleusinian Mysteries. During sacrifice, a falling star was observed in the sky, shooting west to east. He stopped in Ephesus, where he is attested at the estate of the local aristocrat Publius Vedius Antoninus, and made an unexpected stopover at Erythrae, where an elegiac poem in the voice of the local sibyl alludes to his visit. The journey continued by ship through the Aegean and the southern coasts of Asia Minor, lingering in the famed pleasure resorts of Pamphylia and Cilicia, before arriving in Antioch. It is not known how long Verus' journey east took; he might not have arrived in Antioch until after 162. Statius Priscus, meanwhile, must have already arrived in Cappadocia; he would earn fame in 163 for successful generalship.
Dissipation and logistics at Antioch, 162?–165
Lucius spent most of the campaign in Antioch, though he wintered at Laodicea and summered at Daphne, a resort just outside Antioch. He took up a mistress named Panthea, from Smyrna. The biographer calls her a "low-born girl-friend", but she is probably closer to Lucian's "woman of perfect beauty", more beautiful than any of Phidias and Praxiteles' statues. Polite, caring, humble, she sang to the lyre perfectly and spoke clear Ionic Greek, spiced with Attic wit. Panthea read Lucian's first draft, and criticized him for flattery. He had compared her to a goddess, which frightened her—she did not want to become the next Cassiopeia. She had power, too. She made Lucius shave his beard for her. The Syrians mocked him for this, as they did for much else.
Critics declaimed Lucius' luxurious lifestyle. He had taken to gambling, they said; he would "dice the whole night through". He enjoyed the company of actors. He made a special request for dispatches from Rome, to keep him updated on how his chariot teams were doing. He brought a golden statue of the Greens' horse Volucer around with him, as a token of his team spirit. Fronto defended his pupil against some of these claims: the Roman people needed Lucius' bread and circuses to keep them in check.
This, at least, is how the biographer has it. The whole section of the vita dealing with Lucius' debaucheries (HA Verus 4.4–6.6) is an insertion into a narrative otherwise entirely cribbed from an earlier source. Some few passages seem genuine; others take and elaborate something from the original. The rest is by the biographer himself, relying on nothing better than his own imagination.
Lucius faced quite a task. Fronto described the scene in terms recalling Corbulo's arrival one hundred years before. The Syrian army had turned soft during the east's long peace. They spent more time at the city's open-air bars than in their quarters. Under Lucius, training was stepped up. Pontius Laelianus ordered that their saddles be stripped of their padding. Gambling and drinking were sternly policed. Fronto wrote that Lucius was on foot at the head of his army as often as on horseback. He personally inspected soldiers in the field and at camp, including the sick bay.