The Byzantine navy was the naval force of the Eastern Roman Empire. Like the empire it served, it was a direct continuation from its Imperial Roman predecessor, but played a far greater role in the defence and survival of the state than its earlier iteration. While the fleets of the unified Roman Empire faced few great naval threats, operating as a policing force vastly inferior in power and prestige to the legions, the sea became vital to the very existence of the Byzantine state, which several historians have called a "maritime empire".
The Arab–Byzantine wars were a series of wars between a number of Muslim-Arab dynasties and the Byzantine Empire from the 7th to the 11th century. Conflict started during the initial Muslim conquests, under the expansionist Rashidun and Umayyad caliphs, in the 7th century and continued by their successors until the mid-11th century.
Leo of Tripoli, known in Arabic as Rashīq al-Wardāmī, and Ghulām Zurāfa, was a Greek renegade and fleet commander for the Abbasid Caliphate in the early tenth century. He is most notable for his sack of Thessalonica, the Byzantine Empire's second city, in 904.
The Muslim conquest of Sicily began in June 827 and lasted until 902, when the last major Byzantine stronghold on the island, Taormina, fell. Isolated fortresses remained in Byzantine hands until 965, but the island was henceforth under Muslim rule until conquered in turn by the Normans in the 11th century.
The Battle of Krasos was a battle in the Arab–Byzantine Wars that took place in August 804, between the Byzantines under Emperor Nikephoros I and an Abbasid army under Ibrahim ibn Jibril. Nikephoros' accession in 802 resulted in a resumption of warfare between Byzantium and the Abbasid Caliphate. In late summer 804, the Abbasids had invaded Byzantine Asia Minor for one of their customary raids, and Nikephoros set out to meet them. He was surprised, however, at Krasos and heavily defeated, barely escaping with his own life. A truce and prisoner exchange were afterwards arranged. Despite his defeat, and a massive Abbasid invasion the next year, Nikephoros persevered until troubles in the eastern provinces of the Caliphate forced the Abbasids to conclude a peace.
The Emirate of Crete was an Islamic state that existed on the Mediterranean island of Crete from the late 820s to the reconquest of the island by the Byzantine Empire in 961. Although the emirate recognized the suzerainty of the Abbasid Caliphate and maintained close ties with Tulunid Egypt, it was de facto independent.
The Sack of Damietta was a successful raid on the port city of Damietta on the Nile Delta by the Byzantine navy on 22–24 May 853. The city, whose garrison was absent at the time, was sacked and plundered, yielding not only many captives but also large quantities of weapons and supplies intended for the Emirate of Crete. The Byzantine attack, which was repeated in the subsequent years, shocked the Abbasid authorities, and urgent measures were taken to refortify the coasts and strengthen the local fleet, beginning a revival of the Egyptian navy that culminated in the Tulunid and Fatimid periods.
Yazaman or Yazman, surnamed al-Khadim was governor of Tarsus for the Abbasids and chief military leader in the Muslim borderlands with the Byzantine Empire in Cilicia from 882 to his death in 891. He is celebrated for his raids against the Byzantines.
Damian of Tarsus, surnamed Ghulam Yazman, was a Byzantine Greek convert to Islam, governor of Tarsus in 896–897 and one of the main leaders of naval raids against the Eastern Roman Empire in the early 10th century.
The siege of Kamacha by the Abbasid Caliphate took place in autumn 766, and involved the siege of the strategically important Byzantine fortress of Kamacha on the eastern bank of the Euphrates River, as well as a large-scale raid across eastern Cappadocia by a part of the Abbasid invasion army. Both enterprises failed, with the siege dragging on into winter before being abandoned and the raiding force being surrounded and heavily defeated by the Byzantines. The campaign was one of the first large-scale Abbasid operations against Byzantium, and is one of the few campaigns of the Arab–Byzantine wars for which detailed information survives, although it is barely mentioned in Arabic or in Byzantine sources.
The 806 invasion of Asia Minor was the largest of a long series of military operations launched by the Abbasid Caliphate against the Byzantine Empire. The expedition took place in southeastern and central Asia Minor, where the two states shared a long land border.
Ahmad ibn Tughan al-Ujayfi was the governor of Tarsus, Antioch, and the Abbasid Caliphate's borderlands in Cilicia for the semi-autonomous Tulunid dynasty from 891 to 896.
The navy of the Fatimid Caliphate was one of the most developed early Muslim navies and a major military force in the central and eastern Mediterranean in the 10th–12th centuries. As with the dynasty it served, its history can be distinguished into two phases. The first period, from c. 909 to 969, when the Fatimids were based in Ifriqiya, and the second period, lasting until the end of the dynasty in 1171, when the Fatimids were based in Egypt. During the first period, the navy was employed mainly in the constant warfare with the Byzantine Empire in Sicily and southern Italy, where the Fatimids enjoyed mixed success, as well as in the initially unsuccessful attempts to conquer Egypt from the Abbasids and the brief clashes with the Umayyad Caliphate of Córdoba.
The Battle of Cephalonia was a naval battle fought between the Byzantine and Aghlabid fleets near Cephalonia, off the western coast of Greece. The battle was a major Byzantine victory, and one of the rare naval battles that took place during the night in the Middle Ages.
The Battle of Kardia was a naval battle fought in c. 872/3 between the fleets of the Byzantine Empire and the Cretan Saracens off Kardia, in the Gulf of Saros. The battle was a major Byzantine victory.
Photios was a Byzantine renegade and convert to Islam who served the Emirate of Crete as a naval commander in the 870s.
The Battle of the Gulf of Corinth was a battle fought in c. 873 between the fleets of the Byzantine Empire and the Cretan Saracens in the Gulf of Corinth. The Byzantines under Niketas Ooryphas managed to surprise the Saracens, resulting in a major Byzantine victory.
The siege of Chandax in 960-961 was the centerpiece of the Byzantine Empire's campaign to recover the island of Crete which since the 820s had been ruled by Muslim Arabs. The campaign followed a series of failed attempts to reclaim the island from the Muslims stretching as far back as 827, only a few years after the initial conquest of the island by the Arabs, and was led by the general and future emperor Nikephoros Phokas. It lasted from autumn 960 until spring 961, when the main Muslim fortress and capital of the island, Chandax was captured. The reconquest of Crete was a major achievement for the Byzantines, as it restored Byzantine control over the Aegean littoral and diminished the threat of Saracen pirates, for which Crete had provided a base of operations.
The Frankish emperor Louis II campaigned against the Emirate of Bari continuously from 866 until 871. Louis was allied with the Lombard principalities of southern Italy from the start, but an attempt at joint action with the Byzantine Empire failed in 869. In the final siege of the city of Bari in 871, Louis was assisted by a Slavic fleet from across the Adriatic.
