Opsikian
Substate | Defunct
820 CE to 1234 CE
The Opsikian Theme or simply Opsikion is a Byzantine theme (a military-civilian province) located in northwestern Asia Minor (modern Turkey).
Created from the imperial retinue army, the Opsikion is the largest and most prestigious of the early themes, being located closest to Constantinople.
Involved in several revolts in the 8th century, it is split in three after c. 750, and loses its former preeminence.
It survives as a middle-tier theme until after the Fourth Crusade.
Worlds
The Great Crossroads
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The imperial government, headed by the Empress-regent Theodora and the logothetes Theoktistos, have embarked on a sustained assault on the Empire's main political and ideological foe, the Abbasid Caliphate and its dependencies, following the restoration of the veneration of icons in March 843.
This aggressive stance is on the one hand facilitated by the internal stability that the end of the Iconoclasm controversy has brought, and on the other encouraged by a desire to vindicate the new policy through military victories against the Muslims.
The first such campaign, an attempted reconquest of the Emirate of Crete led by Theoktistos in person, had made initial gains, but ultimately ended in disaster.
After scoring a victory over the Arabs in Crete, Theoktistos had learned of a rumor that Theodora intended to name a new emperor, possibly her brother Bardas.
Theoktistos had hurried back to Constantinople, where he discovered that the rumor was false, but in his absence, the imperial army in Crete had been slaughtered by the Arabs.
Theoktistos, according to Byzantine sources, learns in 844 of an Arab invasion of imperial territory in Asia Minor, led by a certain 'Amr, probably the semiautonomous emir of Malatya, Umar al-Aqta.
The Arab sources do not make explicit mention of this campaign.
The Russian scholar Alexander Vasiliev, however, identified it with an expedition recorded in the poems of Abu Tammam and Buhturi, which was led by general Abu Sa'id and took place during the regency of Theodora.
Umar al-Aqta's participation is likely, as he often aided the Abbasids in their raids against the imperial forces.
According to Arab accounts, the troops led by Abu Sa'id comprised men from the border emirates of Qaliqala (Erzurum) and Tarsus.
The Arab forces united at Ardandun (possibly the border fort of Rhodandos) before raiding through the imperial themes of Cappadocia, Anatolikon, Boukellarion, and Opsikion.
Sa'id's troops sacked Dorylaion and even reached the shore of the Bosporus.
Theoktistos leads the imperial army in against the invaders, but is heavily defeated at Mauropotamos ("Black River").
The location of the latter, if indeed it is a river and not a simple toponym, is disputed; it was most likely a tributary of the Sangarius in Bithynia or of the Halys in Cappadocia.
Not only do the Greeks suffer heavy casualties, but many senior officials defect to the Arabs.
Theoktistos returns to Constantinople.
The emperor Leo VI the Wise, soon after the death of his second wife, Zoe Zaoutzaina, takes Eudokia Baïana as his third wife in spring 900.
De Ceremoniis by Constantine VII names as many as three daughters born of the previous marriages but no son.
Leo wants to secure his succession by this marriage.
The work Theophanes Continuatus, a continuation of the chronicle of Theophanes the Confessor by other writers, active during the reign of Constantine VII, records the few details known about her.
According to Theophanes, Eudokia came from the Opsician Theme, which was originally composed of all of Bithynia and Paphlagonia, stretching from Abydos on the Dardanelles to Sinope on the Black Sea and inland to Ancyra, forming most of the northwestern quarter of Asiatic Turkey.
Suleiman ibn Qutalmish, a distant cousin of Malik-Shah, who rules as a chieftain in western Anatolia, captures Nicaea and …
…Nicomedia in about 1075, threatening Constantinople.
The Turkish conquest of Nicaea and Nicomedia prompts Emperor Michael to appeal to Pope Gregory VII for aid against the Seljuqs, promising in return his support for the reunification of the Roman Catholic and Orthodox churches.
In need of help to uphold his unstable throne, Michael arranges the marriage of his son, Constantine, to one of Robert Guiscard's daughters, Helen.
The emperor has fallen increasingly under the influence of Nicephoritzes, an official who attempts to create a state monopoly in grain.
His policy not only angers the great landowners but also leads to higher prices and discontent among the people.
When rioting breaks out in Constantinople, two rival commanders, Nikephoros Bryennios and Nikephoros Botaneiates, each proclaims himself emperor, respectively, at Adrianople and at Nicaea.