Battle of Adrianople

The Battle of Adrianople (9 August 378), sometimes known as the Battle of Hadrianopolis, was fought between a Roman army led by the Roman Emperor Valens and Gothic rebels (largely Thervings as well as Greutungs, non-Gothic Alans, and various local rebels) led by Fritigern. The battle took place about 8 mi north of Adrianople (modern Edirne in European Turkey, near the border with Greece and Bulgaria) in the Roman province of Thracia and ended with an overwhelming victory for the Goths.

Part of the Gothic War (376–382), the battle is often considered the start of the final collapse of the Western Roman Empire in the 5th century. Adrianople actually was fought between the Goths and the Eastern Roman Empire, which ultimately withstood the Gothic invasions and developed into the Byzantine Empire.

Background
In 376 AD, displaced by the invasions of the Huns, the Goths, led by Alavivus and Fritigern, asked to be allowed to settle in the Roman Empire. Hoping that they would become farmers and soldiers, the emperor Valens allowed them to establish themselves in the Empire as allies (foederati). However, once across the Danube (and in Roman territory), the dishonesty of the provincial commanders Lupinicus and Maximus led the newcomers to revolt after suffering many hardships. Valens (of the Eastern Empire) then asked Gratian, the western emperor, for reinforcements to fight the Goths. Gratian sent the general Frigeridus with reinforcements, as well as the leader of his guards, Richomeres. For the next two years preceding the battle of Adrianople there were a series of running battles with no clear victories for either side.

In 378, Valens decided to take control himself. Valens would bring more troops from Syria and Gratian would bring more troops from Gaul.

Valens left Antioch for Constantinople, and arrived on the 30th of May. He appointed Sebastianus, newly arrived from Italy, to reorganize the Roman armies already in Thrace. Sebastianus picked 2,000 of his legionaries and marched towards Adrianople. They ambushed some small Gothic detachments. Fritigern assembled the Gothic forces at Nicopolis and Beroe (now Stara Zagora) to deal with this Roman threat.

Gratian had sent much of his army to Pannonia when the Lentienses (part of the Alamanni) attacked across the Rhine. Gratian recalled his army and defeated the Lentienses near Argentaria (near modern-day Colmar, France.) After this campaign, Gratian, with part of his field army, went east by boat; the rest of his field army went east overland. The former group arrived at Sirmium in Pannonia and at the Camp of Mars (a fort near the Iron Gates), 400 kilometers from Adrianople, where some Alans attacked them. Gratian's group withdrew to Pannonia shortly thereafter.

After learning of Sebastian's success against the Goths, and of Gratian's victory over the Alamanni, Valens was more than ready for a victory of his own. He brought his army from Melanthias to Adrianople, where he met with Sebastian's force. On 6 August, reconnaissance informed Valens that about 10,000 Goths were marching towards Adrianople from the north, about 25 kilometers away. Despite the difficult ground, Valens reached Adrianople where the Roman army fortified its camp with ditch and rampart.

Richomeres, sent by Gratian, carried a letter asking Valens to wait for the arrival of reinforcements from Gratian before engaging in battle. Valens' officers also recommended that he wait for Gratian, but Valens decided to fight without waiting, ready to claim the ultimate prize.

The Goths were also watching the Romans, and on 8 August Fritigern sent an emissary to propose a peace and an alliance in exchange for some Roman territory. Sure that he would be victorious due to his supposed numerical superiority, Valens rejected these proposals. However, his estimates did not take into consideration a part of the Gothic cavalry that had gone to forage further away.

Composition of the Roman troops
Valens' army may have included troops from any of three Roman field armies: the Army of Thrace, based in the eastern Balkans, but which may have sustained heavy losses in 376–377, the 1st Army in the Emperor's Presence, and the 2nd Army in the Emperor's Presence, both based at Constantinople in peacetime but committed to the Persian frontier in 376 and sent west in 377–378.

Valens' army was composed of veterans and men accustomed to war. It comprised seven legions — among which were the Legio I Maximiana and imperial auxiliaries — of 700 to 1000 men each. The cavalry was composed of mounted archers (sagittarii) and Scholae (the imperial guard). However, these did not represent the strong point of the army and would flee on the arrival of the Gothic cavalry. There were also squadrons of Arab cavalry, but they were more suited to skirmishes than to pitched battle.

Ammianus Marcellinus makes references to the following forces under Valens:
 * Legions of Lanciarii, and Mattiarii. The Notitia Dignitatum lists both as legiones palatinae. Some claim that the Mattiarii may have been allied forces. However, mattiarii may refer to mace-armed infantry (mattea being Latin for mace). Valens is referred to as seeking protection with the Lanciarii and Mattiarii as the other Roman forces collapsed (apparently a sign of how desperate the battle had become). Eventually they were unable to hold off the Goths' superior numbers.
 * A battalion of Batavians; they were apparently held in reserve and fled, given a reference to a comes named Victor attempting to bring them up into battle but unable to find them.
 * Scutarii (shielded cavalry) and archers. As one or both were under the command of Bacurius the Iberian, these may have been allied auxiliary troops from Caucasian Iberia (part of modern Georgia) rather than Roman.

He also refers to the following officers:


 * Ricimer (Richomeres), Frankish Comes of Gratian's Domestici (the corps of bodyguards of the emperor who were stationed in the imperial palace) sent to assist Valens in 376. He offered to act as a hostage to facilitate negotiations when Equitus refused. He survived the battle, indicated due to retreating.
 * Sebastianus, arrived from Italy previously, and clearly operating as one of Valens' generals. Killed in the battle.
 * Victor, master-general of the cavalry, a Sarmatian by birth, who led the officers counselling waiting for Gratian.
 * Equitius, a relation of Valens, a tribune and high steward of the palace. He refused to act as a hostage, as he had been a prisoner of the Goths in Dibaltum and escaped, and now feared revenge. Killed in the battle.
 * Bacurius (presumably Romanised Bakur), a native and possibly prince of Iberia, in command of the archers and/or scutarii with Cassio that accompanied Ricimer as hostage, and who attacked without orders.
 * Traianus, apparently in command of Roman forces before Valens assumed command, who was described as an illustrious man whose death in the battle was a great loss. He was supposedly still alive when Valens sought refuge with the Lanciarii and Mattiarii.
 * Victor, the comes who tried to bring the Batavian reserve battalion into action.
 * Cassio, in command of the archers and/or scutarii accompanying Ricimer as hostage.
 * Saturninus, referred to as being able to stay alive by retreating. Presumably an officer or notable given he is referred to by name.
 * Valerianus, Master of the Stable. Killed in battle.
 * Potentius, tribune of the Promoti, a branch of the cavalry, son of Ursicinus, former commander of the forces. He "fell in the flower of his age, a man respected by all persons of virtue."
 * Thirty five tribunes, including those of units and those of the staff, who were killed. Presumably there were more than this, but who survived.

Strength of Valens' army
Several modern historians have attempted to estimate the strength of Valens' army.

Warren Treadgold estimates that, by 395, the Army of Thrace had 24,500 soldiers, while the 1st and 2nd Armies in Emperor's Presence had 21,000 each. However, all three armies include units either formed (several units of Theodosiani among them) or redeployed (various legions in Thrace) after Adrianople. Moreover, troops were needed to protect Marcianopolis and other threatened cities, so it is unlikely that all three armies fought together.

However, most modern historians estimated the real number of Roman troops to be as many as 15,000 men, 10,000 infantry and 5,000 cavalry. This was already a whole lot less than what the other historic accounts claimed.

Order of battle of Valens' army
It is not possible to precisely list the units of the Roman army at Adrianople. The only sources are Ammianus, who describes the battle but mentions few units by name, and the eastern Notitia Dignitatum, which lists Roman army units in the late 4th to early 5th century, after Theodosius. Many units listed in the Balkans were formed after Adrianople; others were transferred from other parts of the Empire, before or after Adrianople; others are listed in two or more sectors. Some units at Adrianople may have been merged or disbanded due to their losses. The Roman forces consisted of heavy infantry, various archers and cavalry.

Composition of the Gothic forces
The Gothic armies were mostly infantry with some cavalry, however; in the battle of Adrianople the large force of Gothic cavalry was 5,000 strong.

There were probably two main Gothic armies south of the Danube. Fritigern led one army, largely recruited from the Therving exiles, while Alatheus and Saphrax led another army, largely recruited from the Greuthung exiles.

Fritigern brought most if not all of his fighters to the battle, and appears to have been the force the Romans first encountered. Alatheus and Saphrax brought most of their cavalry, and possibly some of their infantry, to the battlefield late. These infantry were indicated as being an Alan battalion.

Ammianus records that the Roman scouts estimated 10,000 Gothic troops; but Ammianus dismissed this as an underestimate. This appears to be due to Alatheus and Saphrax's forces being away when the Roman scouts estimated the Goth's numbers before battle. Several modern historians have estimated the strength of the Gothic armies at 12,000–15,000.

Ammianus notes the important role of the Gothic cavalry. Charles Oman, believing that the cavalry were the majority of the Gothic force, interpreted the Battle of Adrianople as the beginning of the dominance of cavalry over infantry for the next thousand years. Some other historians have taken the same view. Burns and other recent historians argue that the infantry were the vast majority of the Gothic force, and that the battle had little effect on the relationship between infantry and cavalry.

Course of battle
On the morning of 9 August, Valens decamped from Adrianople, where he left the imperial treasury and administration under the guard of the legions. The reconnaissance of the preceding days informed him of the location of the Gothic camp north of the city. Valens arrived there after marching for seven hours over difficult terrain.

At around 14:30, the Roman troops arrived in disorder, exhausted and dehydrated, facing the Gothic camp that had been set up on the top of a hill. The Goths, except for their cavalry, took position in front of their wagon circle, inside of which were their families and possessions. Fritigern's objective was to delay the Romans, in order to give enough time for the Gothic cavalry to return. The fields were burnt by the Goths to delay and harass the Romans with smoke, and negotiations began for an exchange of hostages. The negotiations exasperated the Roman soldiers who seemed to hold the stronger position, but they gained precious time for Fritigern.

A detachment of Romans began the battle without orders to do so, believing they would have an easy victory, and perhaps over-eager to exact revenge on the Goths after two years of unchecked devastation throughout the Balkans. The imperial scholae of shield-archers under the command of the Iberian prince Bacurius attacked, but lacking support they were easily pushed back. Then the Roman left-wing reached the circle of wagons, but it was too late. At that moment, the Gothic cavalry, alerted by messengers from the embattled wagon circle, arrived to support the infantry. The cavalry surrounded the Roman troops, who were already in disarray after the failure of the first assault. The Romans retreated to the base of the hill where they were unable to maneuver, encumbered by their heavy armor and long shields. The casualties, exhaustion, and psychological pressure led to a rout of the Roman army. The cavalry continued their attack, and the massacre continued until nightfall.

In the rout, the Emperor himself was abandoned by his guards. Some tried to retrieve him, but the majority of the cavalry deserted. Valens' final fate is unknown; he probably died anonymously on the field. His body was never found. An alternative story circulated after the battle that Valens had escaped the field with a bodyguard and some eunuchs, and hid in a peasant's cottage. The enemy attempted to pillage the cottage, apparently unaware Valens was inside. Valens' men fired arrows from the second floor to defend the cottage and in response the Goths set the cottage on fire. The bodyguard leaped out the window and told the Goths who was inside, but it was too late. Valens perished in the flames.

Implications
According to the historian Ammianus Marcellinus, a third of the Roman army succeeded in retreating, but the losses were uncountable. Many officers, among them the general Sebastian, were killed in the worst Roman defeat since the Battle of Edessa, the high point of the Crisis of the Third Century. The battle was a significant blow for the late Empire, resulting in the destruction of the core army of the eastern Empire, the deaths of valuable administrators, and the destruction of all of the arms factories on the Danube following the battle. The lack of reserves for the army led to a recruitment crisis, which accentuated the strategic and morale impact of the defeat. Despite the losses, the battle of Adrianople did not mark the end of the Roman Empire because the imperial military power was only temporarily crippled.

The defeat at Adrianople signified that the barbarians, fighting for or against the Romans, had become powerful adversaries. The Goths, though partly tamed by Valens' successor Theodosius I (who accepted them once more as allies), were to remain as a distinct entity within its frontiers; sometimes allies; other times enemies. Roman losses could only be compensated by co-opting barbarians into the army as Foederati under their own commanders, translating into political influence.

The long-term implications of the battle of Adrianople have often been overstated, with many 20th century writers repeating Sir Charles Oman's idea that the battle represented a turning point in military history, with heavy cavalry triumphing over Roman infantry and ushering in the age of the Medieval knight. This outdated idea was overturned by T.S Burns in a ground-breaking article in 1973. Burns shows that the Gothic army's cavalry arm was fairly small, that Valens would actually have had more cavalry and that while the role of Fritigern's cavalry was critical to his victory, the battle was a mainly infantry versus infantry affair. The Medieval knight was not to rise for several centuries after Adrianople. It is also often stated that the defeat at Adrianople led to changes in the composition of the late Roman Army and an increase in the use of cavalry. In fact, this process had been going on in the Roman Army long before AD 378, with cavalry increasing its role and status in the Army from at least the time of the Emperor Gallienus (AD 253 to 260).

Obsolete theories
Many older works attribute the Gothic victory to overwhelming Gothic numbers, to Gothic cavalry, and sometimes to Gothic use of stirrups. More recent scholarly works mostly agree that the armies were similarly sized, that the Gothic infantry was more decisive than their cavalry, and that neither the Romans nor the Goths used stirrups until the 6th century.

Stirrups
Isaac Asimov claims that Gothic cavalry adopted technology reverse-engineered from the Huns: iron, full-footed stirrups. This stirrup allowed mounted cavalry not only the ability to throw spears and shoot arrows accurately, but to put the full weight of a horse's mass behind a thrusting spearpoint during a charge.

Most recent scholarship holds that neither the Gothic nor the Roman cavalry used stirrups in this period, instead using horned saddles which also enabled riders to use the bow and lance. Stirrups first appear in Europe in the 6th century, probably brought by the Avars.

Books
Alessandro Barbero (2007). The Day of the Barbarians: The Battle That Led to the Fall of the Roman Empire. ISBN 0-8027-1571-0

Simon Macdowall (2001). Adrianople AD 378: The Goths Crush Rome's Legions.