The Morea revolt of 1453 was a failed peasant rebellion carried out against the rule of the brothers Thomas and Demetrios II Palaiologos, rulers of the Byzantine Despotate of Morea in the Peloponnese peninsula.

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The Byzantine Empire on the eve of the final conquest of Constantinople and the Morea, ca. 1450. The large purple peninsula in the southwest is the Morea, at the time the Empire's most important and prosperous territory.
Upon the death of Byzantine Emperor John VIII Palaiologos in Constantinople in October 1448, the imperial throne fell to Constantine, who was crowned on 6 January 1449 in Mystras before departing for the capital. Two months later, he assumed his new role in Constantinople as Emperor Constantine XI. His younger brothers, Thomas and Demetrius remained in charge of the Morea as joint Despots in his place. Despite assurances to Constantine that they would pledge support to one another, both Thomas and Demetrius coveted the other's lands - in addition, they pressed claims against Venetian port possessions in the Morea, alienating the only power capable of aiding them in resisting the Turks.[4] The mutual hostility went to the point that both despots requested military aid from the Turks against the other. During the final siege of Constantinople, the new Sultan, Mehmed II invaded the Morea again as a distraction to prevent the brothers sending any provisions to Constantinople.
The revolt
Shortly after the fall of Constantinople and the death of the last Byzantine Emperor Constantine XI, 30,000 Albanians under Peter Boua rose in revolt against the two brothers, Thomas and Demetrius II, due to the chronic insecurity and tribute payment to the Turks.[5] The Albanians were later joined by the local Greeks, who by then had a common leader in Manuel Kantakouzenos. Kantakouzenos was hailed as their common Despot, and the rebels asked for Venetian help, while the two brothers asked for Mehmed's help in putting down the rebellion. The situation was further confused by a second rebellion led by Giovanni Asen Zaccaria, who claimed to be the "Prince of Achaia" representing the remains of the Latin element in the Morea. Before the rebellion, Zaccaria had been imprisoned by Thomas but managed to escape during the confusion.[5]
Aftermath
By 1454, both rebellions were put down, but only after a full-scale invasion by the Turks and the restoration of the now completely humiliated Despots. Tribute was reinstated to the same levels and the Despots were to continue their vassalage as before. From the rebel leaders, Boua was pardoned by Mehmet and later became a spokesperson for the Albanian people, Zaccaria fled and ended up as a pensioner in Venice and later the Papal Court, while Kantakouzenos escaped and disappeared from history.[5]
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References
^ Ostrogorsky, p. 508
^ Cheetham, pp. 215-216
^ Ostrogorsky, p. 567
^ Cheetham, p. 217
^ a b c Cheetham, p. 218
Sources
Nicolas Cheetham, Mediaeval Greece, Yale University Press, New Havan & London (1981) ISBN 0-300-02421-5
George Ostrogorsky, History of the Byzantine State, Rutgers University Press, New Jersey, (1969) ISBN 0-8135-0599-2