Battle of Pelagonia in the context of "Michael VIII Palaiologos"

The House of Angelos (/ˈændʒəloʊs, ˈæŋɡəloʊs/; pl. Angeloi; Greek: Ἄγγελος, pl. Ἄγγελοι) was a Byzantine Greek noble family that produced several emperors and other prominent nobles during the middle and late Byzantine Empire. The family rose to prominence through the marriage of its founder, Constantine Angelos, with Theodora Komnene, the youngest daughter of Emperor Alexios I Komnenos. As imperial relatives, the Angeloi held various high titles and military commands under Emperor Manuel I Komnenos. In 1185, following a revolt against Andronikos I Komnenos, Isaac II Angelos rose to the throne establishing the Angeloi as the new imperial family that ruled until 1204. The period was marked by the decline and fragmentation of the Byzantine Empire, culminating in its dissolution by the Fourth Crusade in 1204 under Alexios IV Angelos.

After the Fourth Crusade, another branch of the family managed to establish an independent state in Epirus, which quickly expanded to rule Thessaly and Macedonia. The members of this branch largely eschewed the use of the 'Angelos' surname in favour of the more prestigious 'Doukas' and 'Komnenos', and are collectively known as the Komnenodoukas (Κομνηνοδούκας) dynasty. In c. 1224, Theodore Komnenos Doukas conquered Thessalonica, and founded the Empire of Thessalonica, claiming the Byzantine imperial title in rivalry to the Empire of Nicaea. His empire quickly collapsed after the Battle of Klokotnitsa in 1230. Thessalonica was lost to Nicaea in 1246, and the prospects of recovering Constantinople were dashed at the Battle of Pelagonia in 1259, followed by the re-establishment of the Byzantine Empire under the Palaiologos dynasty in 1261. Often in rivalry to the new Byzantine regime, the Komnenodoukai nevertheless secured recognition and titles from Constantinople, and retained their control over Thessaly (ruled by a cadet line) and Epirus until 1318.
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Alexios Komnenos Strategopoulos (Greek: Ἀλέξιος Κομνηνὸς Στρατηγόπουλος) was a Byzantine aristocrat and general who rose to the rank of megas domestikos and Caesar. Distantly related to the Komnenian dynasty, he appears in the sources already at an advanced age in the early 1250s, leading armies for the Empire of Nicaea against Epirus. After falling out of favour and being imprisoned by Theodore II Laskaris, Strategopoulos sided with the aristocrats around Michael VIII Palaiologos, and supported him in his rise to the throne after Theodore II's death in 1258. He participated in the Pelagonia campaign in 1259, going on to capture Epirus, but his successes were undone in the next year and he was captured by the Epirotes. Released after a few months, he led the unexpected reconquest of Constantinople from the Latin Empire in July 1261, restoring the Byzantine Empire. He was captured again by the Epirotes in the next year and spent several years in captivity in Italy, before being released. He retired from public affairs and died in the early 1270s.