Complex sentence: The son of the famed Turakhan Beg, he was active chiefly in southern Greece: he fought in the Morea against both Byzantines and the Venetians, and in 1456, he conquered the Latin Duchy of Athens.
Split into simpler sentences: The son of the famed Turakhan Beg, he was active chiefly in southern Greece, where he fought in the Morea against both Byzantines and the Venetians. In 1456, he conquered the Latin Duchy of Athens.