Byzantine conquest of Cilicia
The Byzantine reconquest of Cilicia was a series of conflicts and engagements between the forces of the Byzantine Empire under Nikephoros II Phokas and the Hamdanid ruler of Aleppo, Sayf al-Dawla, over control of the region of Cilicia in southeastern Anatolia. Since the Muslim conquests of the 7th century, Cilicia had been a frontier province of the Muslim world and a base for regular raids against the Byzantine provinces in Anatolia. By the middle of the 10th century, the fragmentation of the Abbasid Caliphate and the strengthening of Byzantium under the Macedonian dynasty allowed the Byzantines to gradually take the offensive. Under the soldier-emperor Nikephoros II Phokas (r. 963–969– ), with the help of the general and future emperor John I Tzimiskes, the Byzantines overcame the resistance of Sayf al-Dawla, who had taken control of the former Abbasid borderlands in northern Syria, and launched a series of aggressive campaigns that in 964–965 recaptured Cilicia. The successful conquest opened the way for the recovery of Cyprus and Antioch over the next few years, and the eclipse of the Hamdanids as an independent power in the region.
As of the middle of the tenth century, Byzantium was in the midst of a resurgence. In 961 they had reclaimed Crete from the Muslims and, following the conquest, were prepared to make expeditions against the Arabs in Anatolia. The Emir of Aleppo, and ruler of the Hamdanid dynasty at the time, was Sayf al-Dawla (r. 945-967– ). A confident and aggressive commander, he executed numerous raids into the Greek heartland, as far as Iconium. After al-Dawla confirmed his rule in Aleppo in 944, he continued the Arab practice of raiding into Byzantine territory, formally resuming war in 945/46. Despite the frequency and effectiveness of his raids in disrupting Byzantine commerce and generally creating chaos on Byzantium's eastern front, al-Dawla's tactics were defensive in nature, and his armies never posed a serious threat to Byzantine domination of Anatolia; contemporary Arab sources claim (indeed perhaps exaggerate) that Byzantium's armies probably outnumbered al-Dawla's by around 70,000.
Al-Dawla's Emirate was inherently weak. It lacked any kind of naval presence, as al-Dawla sought actively to avoid any kind of pressure to Byzantium's dominance of the Eastern Mediterranean Sea. Meanwhile, the Thughur system of Hamdanid administration was inefficient and ineffective. Adapted from the Byzantine Themata system, from which the name derives, combined with the devastating effects of Byzantium's scorched earth tactics on the populace, the Thugur system left the Hamdanid provinces in destruction and poverty. Al-Dawla's winter raid (945-6) was of little effect, and fighting between the two powers died down for a few years.
In 948 and 949 the Byzantines managed two successful invasions of the Hamdanids and sacked Hadath in the first expedition and Marash in the second, even raiding as far as Antioch. In 950 al-Dawla attempted to raid into Byzantine territory, and was crushed by Leo Phokas, losing 8,000 men in the "dreadful expedition". Later the same year al-Dawla again attempted to raid Byzantine territory, rejecting their offers of peace, but was soon forced to retire by the coming of winter. The next year Bardas Phokas launched a failed expedition into Cilicia in an attempt to prevent the Arabs from repairing some strategic fortresses. Two years later Bardas once again tried and failed to invade al-Dawla's Cilicia. The Hamdanids would hold out against two more Byzantine attacks in 954 and 955.
More serious conflict began in the spring of 956, when al-Dawla began a renewed invasion of Byzantine territory. John Tzimiskes, commanding the Byzantine army, managed to counter by his own invasion of Cilicia, managing to secure a pass in al-Dawla's rear. However, when the two clashed, al-Dawla won decisively, killing 4,000 of Tzimiskes' men. At the same time, Leo Phokas invaded Syria, engaging and defeating al-Dawla's cousin, Abu'l-'Asha'ir. In 957 Nikephorus managed to capture and subsequently raze Hadath, and al-Dawla was unable to respond due to the discovery of a plot against him. From there the tide continued to turn against al-Dawla. In 958, Tzimiskes invaded Arab territory once again, seizing Dara and defeating an army of 10,000 men under al-Dawla's lieutenant Nadja. The next year Leo Phokas managed a raid which extended as far as Cyrrhus.
Call for Jihad
Tensions reached their apex in 960 when al-Dawla declared a Jihad. He attempted to marshall and consolidate his forces under the call for a holy war perceiving a weakness in Byzantium's defenses following Nicephorus' departure for Crete. Leo soon passed into Muslim territory, avoiding the brunt of al-Dawla's forces and plundering as he went. He waited for the return of the raiding Arab army and soon prepared an ambush for them. Under the Arab general Ali ibn Hamdan, the army was caught completely off-guard by Leo. Its forces were quickly slaughtered and Leo recovered loot of both Byzantine and Arab origin, decisively destroying the army. The successive loss of these battles began to have more internal effects for al-Dawla, as well as external ones, as his own government began to lose faith in him. Unfortunately for al-Dawla, Nicephorus now returned victorious from Crete with the majority of the Byzantine army. From 961-962, Nicephorus led his armies into Cilicia, quickly taking Anazarbus. Nicephorus retired to Byzantine territory for Easter, 962, and returned in the Autumn in order to drive al-Dawla, who was in Cilicia itself, out of the province. He invaded Arab territory with a 70,000-man strong army, taking Marash, Sisium, Duluk, and Manbij. Nicephorus proceeded to ignore al-Dawl's advance forward and brought his army to Aleppo in mid-December, which he managed to capture and plunder. al In 963, war died down between the two powers, as the Byzantine Emperor, Romanus II had recently died, and a brief succession crises was to ensue in which Nicephorus would ascend the throne as Nicephorus II Phocas (r. 963-969– ). On the Hamdanid end, however, things were less peaceful. Al-Dawla faced rebellion after rebellion, first in 961, carried out by Ibn az-Zayyat, then in 963 by Hibat Allah, and finally in 963-64 by Nadja. A brief Arab raid was countered by Tzimiskes who was appointed Nicephorus' successor upon his ascension. He soon invaded Cilicia, defeated an Arab army, and tried and failed to siege the important fortress of Mopsuestia.
Final conquest of Cilicia
By the time Nicephorus became emperor, after his successful seizure of Crete, he had decided on a grander plan to expand Byzantine territory, rather than merely sack the Arab cities and withdraw. He began his invasion in Autumn 964 and set out with an army of 40,000. He began by spreading out his lighter infantry throughout the Cilician countryside and ordered them to loot and plunder the villages in order to ensure a general atmosphere of confusion and disarray among al-Dawla's administration. Nicephorus then marched the main segment of his forces, the Imperial Army plus the forces of the themes of Asia Minor, through Arab territory and began to capture major fortresses and cities. He took Adana, Anazarbus, and around twenty other fortified cities. He then marched on to Mopsuestia. Tarsus and Mopsuestia were the two largest remain fortresses in the region. Nicephorus quickly realized, after bombarding the city, that only a prolonged siege would manage to force Mopsuestia to capitulate. Soon, with the coming of winter, Nicephorus retreated to his regional capital of Caesarea, where he passed the season preparing for next year's campaigning season on the sieges of Mopsuestia and Tarsus.
At the spring of 965, Nicephorus once again collected his forces and departed for Cilicia. This time, however, Nicephorus headed strait for Tarsus. There he met the garrison outside of the walls of the city and engaged it. He decisively defeated the army and drove them back into the fortress. He then blockaded the city, raided the surrounding countryside and left for Mopsuestia, leaving the city besieged, blockade, and surrounded by destruction and desolation. He began to in turn siege Mopsuestia, bombarding the city with archers and siege engines. He then employed a similar strategy as used in the Siege of Chandax only four years earlier. He instructed his engineers to dig under the city fortifications while the Arabs were distracted and collapse the weakest perceived section of the wall. This worked, and soon the Byzantines began to pour into the city from the destroyed section. The city was then looted and razed, while Nicephorus deported all of its inhabitants. He then returned to Tarsus where the populace, after hearing of the destruction of Mopsuestia, sought terms with the Greeks. They handed over the city to Nicephorus in exchange for the safe passage of migrants seeking to emigrate to Syria, which he granted. With the capture of these two cities, Cilicia once again came under the suzerainty of Byzantium, and Nicephorus returned to Constantinople.
It was around this time that on Cyprus the Byzantine general Niketas Chalkoutzes staged a coup. The nature of the circumstances of this coup are dubious due to a lack of sources, but it is clear that the Abbasid authorities had no preconceived notions of it as it was incredibly successful. The island was returned to the Byzantines and reintegrated into the Theme System.
Following the quelling of some civil unrest in the spring of 966, Nicephorus once again set out for the east. Nicephorus' strategy was not one of traditional Byzantine origin, but combined the tactics used by the Arabs with his own strategy. He largely avoided open confrontation, pillaging, raiding and capturing cities where he could. He marched east with his army from Constantinople, joining up with his new forces as he passed through Byzantine Cilicia, and advanced onto Syria. Nicephorus soon led his army to Antioch, where he set up a light siege and began to raid the countryside.
In the fall of 967, Nicephorus captured many forts in southern Syria, and eventually came to Tripoli. He wished to meet up with his navy there, but the winds and tides were uncooperative and he could not besiege the city, and instead marched north to the fortress of Arqa, which he soon captured and looted. It was around this time in 967 that al-Dawla died. His successor, Sa'd al-Dawla, was a weak and ineffectual ruler, and by the time he ascended the throne, Hamdanid territory had become a mere battlefield on which the Byzantines and Fatimids could settle their disputes. Nicephorus did not cease the pillage of Syria until the spring of 969 when he returned to Constantinople. However, he left a large garrison in a citadel of his construction outside of Antioch in order to maintain the siege. Around a year later, Byzantine forces retook Antioch and cemented Byzantine control of the region. 
Following the loss of Cilicia and Antioch, the Hamdanid state began to deteriorate rapidly. A string of rebellions would fracture and crush the dynasty's power, and the state would barely last to the end of the century before being vassalized and subsequently dissolved by the Fatimid Dynasty of Egypt, which would in turn rise to dominate the Levant and the near east for centuries. Byzantium, on the other hand, would continue to expand under the successive emperors Nicephorus, John II Tzimiskes, and Basil II. In fact, the Byzantines would see nearly unchecked expansion for over a century from the conquests of Cilicia and Antioch, only finally being subdued by the Seljuk Empire at the Battle of Manzikert in 1071.
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