March of Turin

Yet in the tenth and early eleventh centuries, the city and valley of Susa were not the most important part of the county, let alone the march, of Turin.

At that time Berengar completed the reorganization of the military districts south of the Po River that was begun by his predecessor Hugh of Arles to defend against attacks by the Saracens from the sea.

In doing so, he formed three new territories, for which he appointed margraves with loyal followers:[3] In 961, Holy Roman Emperor Otto I invaded Italy and displaced Berengar.

Otto then continued the work that had been done to reorganize the northwest into the three great marches and in 964 he appointed Arduin margrave of Turin.

To the south, lands which had composed the march of Turin were annexed by Adelaide's nephew, Boniface del Vasto.