The March of Genoa or Eastern Liguria was created in 961 by Holy Roman Emperor Otto I.
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: In 961, Otto invaded Italy and displaced Berengar.
For the Marquisate of Turin (Marca Arduinica), Otto reappointed Arduin Glaber as margrave.
For Eastern Liguria (Marca Obertenga), Otto returned Oberto to his lands, with the title of count palatine.