Original sentence: In the tradition of Charlemagne, Evrard forced the vanquished to convert to Christianity, meritoriously (for the time and his contemporaries) teaching them the Gospel, himself.The war wore on for several years and ended in 851 with the defeat of the Saracens.These Saracens had been named as helpers, in 842, by the Duke of Bénévent and they would soon become dangerous enemies for the entire peninsula
Edited sentence: In the tradition of Charlemagne, Evrard forced the vainquished to convert to Christianity, meritoriously (for the time and his contemporaries) teaching them the Gospel, himself.The war wore on for several years and ended in 851 with the defeat of the Sarasins.These  had been named as helpers, in 842, by the Duke of Bénévent and they would soon become dangerous enemies for the entire peninsula