 In 1373, John V's son and heir Andronikos IV Palaiologos rebelled against his father in an attempt to seize the throne, instigating a fourth series of Palaiologan civil wars.John V was initially victorious, imprisoning and disinheriting Andronikos IV and appointing a younger son, Manuel II Palaiologos, as his successor instead.However, Andronikos eventually escaped from prison and successfully took the throne in 1376 with aid from Genoa, imprisoning his father and his younger brother.