Complex sentence: The arrival of the seemingly unbeatable Ottoman soldiers surrounding Constantinople caused a panic in Constantinople, capitalized by John V who, with the assistance of the Genoese, staged a coup and ousted John VI Cantacuzenus in November 1354.
Split into simpler sentences: The arrival of the seemingly unbeatable Ottoman soldiers surrounding Constantinople caused a panic in Constantinople. This was capitalized by John V who, with the assistance of the Genoese, staged a coup and ousted John VI Cantacuzenus in November 1354.