Complex sentence: According to Doukas, as Leontares was preparing to take possession of Gallipoli, Junayd and Mustafa arrived, and informed him that their agreement was void, as they could not countenance the surrender of their own people to the infidels.
Split into simpler sentences: According to Doukas, as Leontares was preparing to take possession of Gallipoli, Junayd and Mustafa arrived. They informed him that their agreement was void, as they could not countenance the surrender of their own people to the infidels.