Romanos IV Diogenes in the context of "Alp Arslan"

The Battle of Manzikert or Malazgirt was fought between the Byzantine Empire and the Seljuk Empire on 26 August 1071 near Manzikert, Iberia (modern Malazgirt in Muş Province, Turkey). The decisive defeat of the Byzantine army and the capture of the emperor Romanos IV Diogenes played an important role in undermining Byzantine authority in Anatolia and Armenia, and allowed for the gradual Turkification of Anatolia. Many Turks, travelling westward during the 11th century, saw the victory at Manzikert as an entrance to Asia Minor.

The brunt of the battle was borne by the Byzantine army's professional soldiers from the eastern and western tagmata, as large numbers of mercenaries and Anatolian levies fled early and survived the battle. The fallout from Manzikert was disastrous for the Byzantines, resulting in civil conflicts and an economic crisis that severely weakened the Byzantine Empire's ability to defend its borders adequately. This led to the mass movement of Turks into central Anatolia – by 1080, an area of 78,000 square kilometres (30,000 sq mi) had been gained by the Seljuk Turks. It took three decades of internal strife before Alexius I (1081–1118) restored stability to Byzantium. Historian Thomas Asbridge says: "In 1071, the Seljuqs crushed an imperial army at the Battle of Manzikert (in eastern Asia Minor), and though historians no longer consider this to have been an utterly cataclysmic reversal for the Greeks, it still was a stinging setback." It was the only time a Byzantine emperor became the prisoner of a Muslim commander, and the first time since Valerian that a Roman emperor was captured alive by an enemy force.

The Byzantine Empire was ruled by emperors of the Doukas dynasty between 1059 and 1081. There are six emperors and co-emperors of this period: the dynasty's founder, Emperor Constantine X Doukas (r. 1059–1067), his brother John Doukas, katepano and later Caesar, Romanos IV Diogenes (r. 1068–1071), Constantine's son Michael VII Doukas (r. 1071–1078), Michael's son and co-emperor Constantine Doukas, and finally Nikephoros III Botaneiates (r. 7 January 1078 – 1 April 1081), who claimed descent from the Phokas family.

Under the rule of the Doukids, Byzantium was fighting a losing battle against the Seljuk Turks, losing most of its remaining possessions in Asia Minor following the catastrophic defeat at the Battle of Manzikert in 1071 and the following civil war after the death of Romanos IV Diogenes.Byzantium also incurred substantial loss of territory in the Balkans, to the Serbs, as well as losing its final foothold in Italy, to the Normans.

Digenes Akritas (Latinised as Acritas; Greek: Διγενῆς Ἀκρίτας) is a medieval Greek romantic epic that emerged in the 12th-century Byzantine Empire. It is the lengthiest and most famous of the acritic songs, Byzantine folk poems celebrating the lives and exploits of the Akritai, the inhabitants and frontier guards of the empire's eastern Anatolian provinces. The acritic songs represented the remnants of an ancient epic cycle in Byzantium and, due to their long oral transmission throughout the empire, the identification of precise references to historical events may be only conjectural. Set during the Arab-Byzantine wars, the poem reflects the interactions, along with the military and cultural conflicts of the two polities. The epic consists of between 3,000 and 4,000 lines and it has been pieced together following the discovery of several manuscripts. An extensive narrative text, it is often thought of as the only surviving Byzantine work truly qualifying as epic poetry. Written in a form of vernacular Greek, it is regarded as one of its earliest examples, as well as the starting point of Modern Greek literature.

The epic details the life of the eponymous hero, Basil, whose epithet Digenes Akritas ("two-blood border lord") alludes to his mixed Greek and Arab descent. The text is divided into two halves: the first half, epic in tone, details the lives and encounter of Basil's parents; his mother, a Byzantine noblewoman from the Doukas family named Eirene, and his father, an Arab emir named Mousour who, after abducting Eirene in a raid, converted to Christianity and married her. The second half, in a more romantic atmosphere, discusses Basil's early childhood and later, often from a first-person point of view, his struggles and acts of heroism on the Byzantine borders. Allusions to Greek mythological elements, including the Hercules-like childhood of Basil, and his affair with the Amazon warrior Maximo, also appear throughout the text. Though a legendary figure, it has been suggested that inspiration for the hero may have derived from the 11th-century Cappadocian general and emperor Romanos Diogenes.

Nikephoros III Botaneiates (Greek: Νικηφόρος Βοτανειάτης, romanized: Nikēphóros Botaneiatēs; 1002–1081), Latinized as Nicephorus III Botaniates, was Byzantine Emperor from 7 January 1078 to 1 April 1081. He became a general during the reign of Byzantine Emperor Constantine IX Monomachos, serving with distinction during the Pecheneg revolt of 1048–1053. In 1057 he aided Isaac I Komnenos in overthrowing Emperor Michael VI Bringas, leading forces at the decisive Battle of Petroe. Under the Emperor Constantine X Doukas Nikephoros was made doux, first of Thessalonica and subsequently of Antioch. In the latter position he repelled numerous incursions from the Emirate of Aleppo. Constantine X died in 1067 and Empress Eudokia Makrembolitissa married Romanos IV Diogenes; Nikephoros, who had also been a candidate for Eudokia's hand and the position of emperor, was exiled and remained in retirement until Emperor Michael VII summoned him to serve as kouropalates and governor of the Anatolic Theme.

Having insulted Emperor Michael with overly frank appeals for help against the Seljuk Turks in Byzantine Anatolia, Nikephoros decided to protect himself from reprisals by seizing the throne. His military acumen and family renown won him strong support, and he took power in 1078 with the approval of the Byzantine Senate and the citizens of Constantinople. As emperor he faced numerous revolts, including those of Nikephoros Bryennios, Nikephoros Basilakes, and Constantine Doukas, as well as an attempted assassination by the Varangian Guard. Nikephoros performed many acts to increase his legitimacy and support, spending large amounts on donatives for the army and his supporters, forgiving all debt in arrears, and instituting minor legal reforms. Diplomatically, he secured the submission of Theodore Gabras and Philaretos Brachamios, governors of Trebizond and Antioch, respectively, who had become de facto independent of the Byzantine Empire.

Constantine Diogenes (Greek: Κωνσταντῖνος Διογένης; died 1032) was a Byzantine general of the early 11th century, active in the Balkans. He served with distinction in the final stages of the Byzantine conquest of Bulgaria under Emperor Basil II, and occupied high commands in the Balkans until his arrest in 1029, as the result of his participation in a conspiracy against Emperor Romanos III Argyros. Imprisoned and forced to enter a monastery, he killed himself in 1032 during an inquest on a further conspiracy. He was the father of Emperor Romanos IV Diogenes.

Eudokia Makrembolitissa (Greek: Εὐδοκία Μακρεμβολίτισσα, romanized: Evdokía Makremvolítissa) was a Byzantine empress by her successive marriages to Constantine X Doukas and Romanos IV Diogenes. She acted as ruler with her two sons in 1067, and resigned her rule by marriage to Romanos IV Diogenes. When he was deposed in 1071 she resumed the rule with her son Michael VII, but was soon forced to resign again.

Because she essentially ruled in her own right during her rules and retained the title of empress, several modern scholars consider Eudokia to have been empress regnant in 1067 and some also in 1071.