Byzantine–Arab wars (780–1180)

In 629, conflict between Byzantine Empire and Arabs started when both parties confronted in the Battle of Mu'tah. Having recently converted to Islam and unified by the Islamic Prophet's call for a Jihad (struggle) against the Byzantine and Persian Empires, they rapidly advanced and took advantage of the chaos of the Byzantine Empire, which had not fully consolidated its re-acquisitions from the Persian invasions in c. 620. By 642, the Empire had lost Egypt, Palestine, Syria and Mesopotamia.[8] Despite having lost two-thirds of its land and resources (most of all the grain supply of Egypt) the Empire nonetheless retained 80,000 troops, thanks to the efficiency of the Thema system and a reformed Byzantine economy aimed at supplying the army with weapons and food.[9] With these reforms, the Byzantines were able to inflict a number of defeats against the Arabs; twice at Constantinople in 674 and 717 and at Akroinon in 740.[10] Constantine V, the son of Leo III (who had led Byzantium to victory in 717 and 740) continued the successes of his father by launching a successful offensive that captured Theodosioupolis and Melitene. Nonetheless, these conquests were temporary; the Iconoclasm controversy, the ineffective rule of Irene and her successors coupled with the resurrection of the Western Roman Empire under the Frankish Carolingian Empire and Bulgarian invasions meant that the Byzantines were on the defensive again.

Michael III was only two years of age when his father died. His mother, the Empress Theodora took over as regent. After the regency had finally removed Iconoclasm, war with the Saracens resumed. Although an expedition to recover Crete failed in 853, the Byzantine scored three major success in 853 and 855. A Byzantine fleet sailed unopposed in Damietta and set fire to all the ships in the harbour, returning with many prisoners.[14] Better still for Constantinople was the desperate and futile defense by the Emir of Melitene, whose realm was lost by the Arabs forever.[15] Insult was added to injury for the Arabs when the Arab governor of Armenia began losing control of his domain. After the 9th century, the Arabs would never be in a dominant position in the East.

In the West however, things went the Saracen way; Messina and Enna fell in 842 and 859 whilst Islamic success in Sicily encouraged the warriors of the Jihad to take Bari in 847, establishing the Emirate of Bari which would last to 871. In invading southern Italy, the Arabs attracted the attention of the Frankish powers north.

Michael III decided to remedy the situation by first taking back Crete from the Arabs. The island would provide an excellent base for operations in southern Italy and Sicily or at the least a supply base to allow the still resisting Byzantine troops to hold out. In 865 Bardas, maternal uncle to Michael III and one of the most prominent members of his regency, was set to launch an invasion when a potential plot against his wife by Basil I and Michael III (the former being the future emperor and favorite of the latter) was discovered. Thus Islamic Crete was spared from an invasion by Byzantium's greatest general at the time.[16]

Until this time, the Byzantine Empire had been concerned solely with survival and with holding on to what they already had. Numerous expeditions to Crete and Sicily were sadly reminiscent of the failures of Heraclius, even though the Arab conquest of Sicily did not go according to plan. After Leo's death in 912 the Empire became embroiled in problems with the regency of the seven-year-old Constantine VII and with invasions of Thrace by Simeon I of Bulgaria.[20]

Arab conquest of Sicily. Byzantine reinforcements were few, and operations were primarily defensive in nature. The loss of Crete and the Arab capture of Calabria forced Constantine VII to pay tribute.

The situation changed however when the admiral Romanos Lekapenos assumed power as a co-emperor with three of his rather useless sons and Constantine VII, thus ending the internal problems with the government. Meanwhile, the Bulgar problem more or less solved itself with the death of Simeon in 927, so Byzantine general John Kourkouas was able to campaign aggressively against the Saracens from 923 to about 950.[21] Armenia was consolidated within the Empire whilst Melitene, which had been a ruined emirate since the 9th century, was annexed at last. In 941 John Kourkouas was forced to turn his army north to fight off the invasion of Igor I of Kiev, but he was able to return to lay siege to Edessa—no Byzantine army had reached as far since the days of Heraclius. In the end the city was able to maintain its freedom when Al-Muttaqi agreed to give up a precious Christian relic: the "Image of Edessa".[22]

Constantine VII assumed full power in 945. Whilst his predecessor, Romanos I had managed to use diplomacy to keep peace in the West against the Bulgars, the East required the force of arms to achieve peace. Constantine VII turned to his most powerful ally, the Phocas family. Bardas Phokas the Elder had originally supported the claims of Constantine VII against those of Romanos I, and his position as strategos of the Armeniakon Theme made him the ideal candidate for war against the Caliphate.[23] Nevertheless, Bardas was wounded in 953 without much success, though his son Nikephoros Phokas was able to inflict a serious defeat on the Caliphate: Adata fell in 957 whilst Nikephoros' young nephew, John Tzimiskes, captured Samosata in the Euphrates valley in 958.[23]

Romanos II launched the largest expedition by Byzantium since the days of Heraclius. A mammoth force of 50,000 men, 1,000 heavy transports, over 300 supply ships, and some 2,000 Greek Fire Ships under the brilliant Nikephoros Phokas set sail for Candia, the Islamic capital of Crete.[24] After an eight-month siege and a bitter winter,[24] Nikephoros sacked the city. News of the reconquest was met with great delight in Constantinople with a night-long service of thanksgiving was given by the Byzantines in the Hagia Sophia.[25]

Nikephoros saw none of this gratitude, denied a triumph due to Romanus II's fear of feeding his ambitions.[25] Instead, Nikephoros had to march rapidly to the East where Saif al-Daula of the Hamdanid dynasty, the Emir of Aleppo, had taken 30,000 men into Imperial territory,[25] attempting to take advantage of the army's absence in Crete. The Emir was one of the most powerful independent rulers in the Islamic world—his domains included Damascus, Aleppo, Emesa, and Antioch.[25] After a triumphant campaign, Saif was bogged down with overwhelming numbers of prisoners and loot. Leo Phokas, brother of Nikephoros, was unable to engage the Emir in an open battle with his small army. Instead, Saif found himself fleeing from battle with 300 cavalry and his army torn to pieces by a brilliantly planned ambush in the mountain passes of Asia Minor. With great satisfaction, Christian captives were substituted with recently acquired Muslims.[26]

When Nikephoros arrived and linked up with his brother, their army operated efficiently and had by early 962 returned some 55 walled tows in Cilicia to Byzantium.[26] Not many months later, the Phokas brothers were beneath the walls of Aleppo. The Byzantines stormed the city on December 23 destroying all but the citadel that was zealously held by a few soldiers of the Emir. Nikephoros ordered a withdrawal; the Emir of Aleppo was badly beaten and would no longer pose a threat.[26] The troops still holding out at the citadel were ignored with contempt. News of the death of Romanos II reached Nikephoros before he had left Cappadocia.

The military force of the Arab world had been in decline since the 9th century, illustrated by losses in Mesopotamia and Syria, and by the slow conquest of Sicily. While the Byzantines attained successes against the Arabs, a slow internal decay after 1025 a.d. was not arrested, precipitating a general decline of the Empire during the 11th century.[36] (This instability and decline ultimately featured a sharp decline in central Imperial authority, succession crises and weak legitimacy; a willful disintegration of the Theme system by the Constantinopolitan bureaucrats in favour of foreign mercenaries to suppress the growing power of the Anatolian military aristocracy; a decline of the free land-owning peasantry under pressure from the military aristocracy who created large Latifundia which displaced the peasantry, thus further undermining military manpower. Very frequent revolt and civil war between the bureaucrats and the military aristocracy for supremacy; which as a result facilitated unruly mercenaries and foreign raiders like the Turks or Pechenegs to plunder the interior with little meaningful resistance). The short and uneventful reign of Constantine VIII (1025–28) was followed by the incompetent Romanos III (1028–34). When Romanos marched his army to Aleppo, he was ambushed by the Arabs.[37] Despite this failure, Romanos' general George Maniaces was able to recover the region and defend Edessa against Arab attack in 1032. Romanos III's successor (and possibly his murderer) Michael IV the Paphlagonian ordered an expedition against Sicily under George Maniaces. Initial Byzantine success led to the fall of Messina in 1038, followed by Syracuse in 1040, but the expedition was riddled with internal strife and was diverted to a disastrous course against the Normans in southern Italy.[6]

Following the loss of Sicily and most of southern Italy, the Byzantine Empire collapsed into a state of petty inter-governmental strife. Isaac I Komnenos took power in 1057 with great ability and promise,[38] but his premature death, a brief two-years in power, was too short for effective lasting reform. The Fatimid and Abbasid Caliphate were already busy fighting the Seljuq dynasty. The Byzantines eventually mustered a great force to counter these threats under Romanos IV, co-emperor from 1068 to 1071. He marched to meet the Seljuk Turks, passing through an Anatolia verging on anarchy. His army was frequently ambushed by local Armenian subjects in revolt. Facing hardship to enter the Armenian Highlands, he ignored the truce made with the Seljuks and marched to retake recently lost fortresses around Manzikert. With part of his army ambushed and another part deserting, Romanos was defeated and captured at the Battle of Manzikert in 1071 by Alp Arslan, head of the Great Seljuq Empire.[39][40] Although the defeat was minor, it triggered a devastating series of civil wars which saw Turkish raiders march largely unopposed to plunder deeper and deeper into Anatolia as well as rival Byzantine factions hire Turkish war bands to aid them in exchange for garrisoning cities. This saw most of the Asia Minor come under the rule of the Turkic raiders by 1091.[3]

In 1081 Alexius I Comnenus seized power and re-initiated the Komnenian dynasty, initiating a period of restoration. Byzantine attention was focused primarily on the Normans and the Crusades during this period, and they would not fight the Arabs again until the end of the reign of John II Comnenus.

Komnenian expeditions against Egypt

See also: Crusader invasions of Egypt and Komnenian Byzantine army

The Levant, 1135

John II Komnenos pursued a pro-Crusader policy, actively defending the Crusader states against the forces of Zengi. His army marched and laid siege to Shaizar, but the Principality of Antioch betrayed the Byzantines with inactiveness.[41] John II therefore had little choice but to accept the Emir of Mosul's promise of vassalage and annual tribute to Byzantium.[41] The other choice would have been risking a battle whilst leaving his siege equipment in the hands of the untrustworthy Crusaders. John could have beaten Zengi, but Zengi was not the only potential foe for Byzantium.

John II died in 1143. The foolishness of the Principality of Antioch meant that Edessa fell, and now the great Patriarchate was on the front line.[42] A failed siege on Damascus in the Second Crusade forced the Kingdom to turn south against Egypt.[43] The new Byzantine Emperor, Manuel I Komnenos, enjoyed the idea of conquering Egypt, whose vast resources in grain and in native Christian manpower (from the Copts) would be no small reward, even if shared with the Crusaders. Alas, Manuel Komnenos worked too quickly for the Crusaders. After three months the Siege of Damietta in 1169 failed,[44] although the Crusaders received a mixed diet of defeat (with several invasions failing) and some victories. The Crusaders were able to negotiate with the Fatimids to surrender the capital to a small Crusader garrison and pay annual tribute,[45] but a Crusader breach of the treaty coupled with the rising power of the Muslims led to Saladin becoming master of Syria and Egypt.

In 1171, Amalric I of Jerusalem came to Constantinople in person, after Egypt had fallen to Saladin.[46] In 1177, a fleet of 150 ships was sent by Manuel I to invade Egypt, but it returned home after appearing off Acre due to the refusal of Philip, Count of Flanders, and many important nobles of the Kingdom of Jerusalem to help.[47]

In that year Manuel Komnenos suffered a defeat in the Battle of Myriokephalon against Kilij Arslan II of the Seljuk Sultanate of Rûm.[48] Even so, the Byzantine Emperor continued to have an interest in Syria, planning to march his army south in a pilgrimage and show of strength against Saladin's might. Nonetheless, like many of Manuel's goals, this proved unrealistic, and he had to spend his final years working hard to restore the Eastern front against Iconium, which had deteriorated in the time wasted in fruitless Arab campaigns.

• Byzantine army
• Byzantine Empire
• Gothic Wars (disambiguation)

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