In the early 15th century, the Peloponnese peninsula was divided between three powers: the Latin Principality of Achaea in the north and west, the Byzantine Greek Despotate of the Morea in the south and east, and Argos and Nauplia, Coron and Modon and some attendant forts, held by the Republic of Venice.

[2] Carlo I Tocco, the ruler of the County palatine of Cephalonia and Zakynthos, of Lefkada and of the Despotate of Epirus, took advantage of the Byzantine-Achaean struggles to extend his domains into the Peloponnese: in 1407–1408 his brother Leonardo seized and plundered the fortress of Glarentza, in the northwestern Peloponnese, and in 1421 Carlo bought permanent possession of it from Oliverio Franco, who had seized it from the Achaean prince Centurione II Zaccaria three years earlier.

[3] In February 1423, a shaky truce was brokered between Zaccaria, Tocco, and the Byzantines by the Venetians, who were eager to establish a common front against the Ottomans,[4] but this did not prevent a major Ottoman raid into the peninsula by Turahan Bey in summer 1423, nor did it stop the aggressive Byzantine despot, Theodore II Palaiologos, from raiding Venetian territory and even capturing Centurione Zaccaria in June 1424.

[7][8] The victory was recorded in a lengthy anonymous panegyric to Manuel II Palaiologos and his son John VIII, which is also the main source of information about the battle.

Patras fell in May 1430, and by 1432, Constantine and his brothers had deposed the last Latin feudatories and restored the entire peninsula, with the exception of the Venetian possessions, to Byzantine control.