Битва при Дуррахе: Норманнское вторжение в Балканы (Bitva pri Durrakhe: Normanskoe vtorzhenie v Balkany)

Part of the First Norman invasion of the Balkans

The Battle of Dyrrhachium took place on October 18, 1081 between the Byzantine Empire, led by the Emperor Alexios I Komnenos (r. 1081–1118), and the Normans of southern Italy under Robert Guiscard, Duke of Apulia and Calabria. The battle was fought outside the city of Dyrrhachium (present day Durrës in Albania), the major Byzantine stronghold in the western Balkans, and ended in a Norman victory. Following the Norman conquest of Byzantine Italy and Saracen Sicily, the Byzantine emperor, Michael VII Doukas (r. 1071–1078), betrothed his son to Robert Guiscard's daughter. When Michael was deposed, Robert took this as an excuse to invade the Byzantine Empire in 1081. His army laid siege to Dyrrhachium, but his fleet was defeated by the Venetians. On October 18, the Normans engaged a Byzantine army under Alexios I Komnenos outside Dyrrhachium. The battle began with the Byzantine right wing routing the Norman left wing, which broke and fled. Varangian mercenaries joined in the pursuit of the fleeing Normans, but became separated from the main force and were massacred. Norman knights in the centre attacked the Byzantine centre and routed it, causing the bulk of the Byzantine army to rout. After this victory, the Normans took Dyrrhachium in February 1082 and advanced inland, capturing most of Macedonia and Thessaly. Robert was then forced to leave Greece to deal with an attack on his ally, the Pope, by the Holy Roman Emperor, Henry IV (r. 1084–1105). Robert left his son Bohemond in charge of the army in Greece. Bohemond was initially successful, defeating Alexios in several battles, but was defeated by Alexios outside Larissa in 1083. Forced to retreat to Italy, Bohemond lost all the territory gained by the Normans in the campaign. The Byzantine recovery began the Komnenian restoration.

The Normans first arrived in Southern Italy in 1015 from northern France and served local Lombard lords as mercenaries against the Byzantine Empire. As they were paid with lands, soon they were powerful enough to challenge Papal authority; in 1054, they defeated the Pope at the Battle of Civitate, forcing him to acknowledge their authority. In 1059, the Pope made Robert Guiscard, of the Hauteville family, Duke of Apulia, Calabria, and Sicily. However, most of Apulia and Calabria were in Byzantine hands, and Sicily was in Saracen hands. By 1071, Robert, together with his brother Roger, had taken over the last Byzantine stronghold in Italy, Bari. By the next year, they conquered all of Sicily, ending the Islamic Emirate of Sicily. In 1074, the Byzantine Emperor Michael VII sent an envoy to Robert offering the hand of his son Constantine to Robert's daughter Helena. Guiscard accepted the offer and sent his daughter to Constantinople. However, in 1078, Michael was overthrown by Nicephorus Botaneiates, an event that destroyed any chances Helena had for the throne. This gave Robert a motive to invade the empire claiming his daughter had been mistreated; however, his intervention was delayed by a revolt in Italy. Robert conscripted all men of a fighting age into the army, which he refitted. Meanwhile, he sent an ambassador to the Byzantine court with orders to demand proper treatment for Helena and to win over the Domestic of the Schools, Alexios. The results of these attempts remain unknown, but the ambassador fell under Alexios's charm and as he was returning to Italy, he heard of Alexios's successful coup against Botaneiates,

The Norman fleet of 150 ships including 60 horse transports set off towards the Byzantine Empire at the end of May 1081. The army numbered 15,000 men, including about 1,300 Norman knights. The fleet sailed to Avalona in Byzantine territory; they were joined by several ships from Ragusa, a republic in the Balkans who were enemies of the Byzantines. The city was well defended on a long, narrow peninsula running parallel to the coast, but separated by marshlands. Guiscard brought his army onto the peninsula and pitched camp outside the city walls. However, as Robert's fleet sailed to Dyrrhachium, it was hit by a storm and lost several ships. The Doge, alarmed by Norman control of the Strait of Otranto, took command of the Venetian fleet and sailed at once, surprising the Norman fleet under the command of Bohemond as night was falling. The Normans counter attacked tenaciously, but their inexperience in naval combat betrayed them. The experienced Venetian navy attacked in a close formation known as "sea harbour" and together with their use of Greek fire "bombs", the Norman line scattered, and the Venetian fleet sailed into Dyrrhachium's harbour.

Robert was not discouraged by this naval defeat, and began his siege of Dyrrhachium. In command of the garrison at Dyrrhachium was the experienced general George Palaiologos, sent by Alexios with orders to hold out at all costs while Alexios himself mustered an army to relieve the city. Robert's camp was struck by disease; according to contemporary historian Anna Comnena up to 10,000 men died, including 500 knights. Even so, the situation of the Dyrrhachium garrison grew desperate because of the effects of Norman siege weapons. Alexios learned of this while he was in Salonica with his army so he advanced in full force against the Normans. According to Comnena, Alexios had about 20,000 men; historian John Haldon puts the army's size between 18,000 and 20,000 men, while John Birkenmeier estimates it between 20–25,000 men. It consisted of Thracian and Macedonian tagmata, which numbered about 5,000 men; the elite excubitors and vestiaritai units, which numbered around 1,000 men; a force of Manichaeans which comprised 2,800 men, Thessalian cavalry, Balkan conscripts, Armenian infantry and other light troops. As well as the native troops, the Byzantines were joined by 2,000 Turkish and 1,000 Frankish mercenaries, about 1,000 Varangians and 7,000 Turkish auxiliaries sent by the Seljuk Sultanate of Rûm. Alexios also withdrew the tagmas from Heraclea Pontica and the remaining Byzantine holdings in Asia Minor and by doing so, he effectively left them to be overrun by the Turks. He held a war council there and sought advice from his senior officers; among them was George Palaiologos, who had managed to sneak out of the city. Guiscard, however, had been informed of Alexios' arrival by his scouts and on the night of October 17, he moved his army from the peninsula to the mainland. Upon learning of Guiscard's move, Alexios revised his battle plan. He split his army into three divisions, with the left wing under the command of Gregory Pakourianos, the right wing under the command of Nikephoros Melissenos, and himself in command of the centre. Guiscard formed his battle line opposite Alexios's, with the right wing under the command of the Count of Giovinazzo, the left under Bohemond and Guiscard facing Alexios in the centre. The archers had been commanded to move in front of the Varangians and loose a volley before retreating behind them. The archers continued this tactic until the army neared contact. Meanwhile, George Palaiologos sortied out of Dyrrhachium, but failed to save the situation. Alexios's ally, Serbian King Constantine Bodin stayed aside with his army, intending to await the outcome of the battle. When the Byzantines were defeated and started to flee, Bodin retreated with his army. The Turks who had been lent to him by the Seljuk Sultan Suleyman I followed Constantine's example. The battle was a heavy defeat for Alexios. Historian Jonathan Harris states that the defeat was "every bit as severe as that at Manzikert." He lost about 5,000 of his men, including most of the Varangians. Norman losses are unknown, but John Haldon claims they are substantial as both wings broke and fled. Historian Robert Holmes states: "The new knightly tactic of charging with the lance couched – tucked firmly under the arm to unite the impact of man and horse – proved a battle winner." George Palaiologos had not been able to re enter the city after the battle and left with the main force. The defense of the citadel was left to the Venetians, while the city itself was left to the Count of the Tent mobilizing from Arbanon (ἐξ Ἀρβάνων ὁρμωμένω Κομισκόρτη). In February 1082, Dyrrhachium fell after a Venetian or Amalfian citizen opened the gates to the Normans. The Norman army proceeded to take most of northern Greece without facing much resistance. While Guiscard was in Kastoria, messengers arrived from Italy, bearing news that Apulia, Calabria, and Campania were in revolt. He also learned that the Holy Roman Emperor, Henry IV, was at the gates of Rome and besieging Pope Gregory VII, a Norman ally. Alexios had negotiated with Henry and given him 360,000 gold pieces in return for an alliance. Henry responded by invading Italy and attacking the Pope. Guiscard rushed to Italy, leaving Bohemond in command of the army in Greece. Alexios, desperate for money, ordered the confiscation of all the church's treasure. With this money, Alexios mustered an army near Thessalonica and went to fight Bohemond. However, Bohemond defeated Alexios in two battles: one near Arta and the other near Ioannina. This left Bohemond in control of Macedonia and nearly all of Thessaly. Bohemond advanced with his army against the city of Larissa. Meanwhile, Alexios had mustered a new army and with 7,000 Seljuk Turks sent by the Sultan, he advanced on the Normans at Larissa and defeated them. The demoralised and unpaid Norman army returned to the coast and sailed back to Italy. Meanwhile, Alexios granted the Venetians a commercial colony in Constantinople, as well as exemption from trading duties in return for their renewed aid. They responded by recapturing Dyrrhachium and Corfu and returning them to the Byzantine Empire. These victories returned the Empire to its previous status quo and marked the beginning of the Komnenian restoration.

Anna Comnena (translated by E. R. A. Sewter). The Alexiad. London: Penguin Books, 1996, .