When we last left Grifo, he had just gained his freedom after being imprisoned by his half-brother Pepin after the death of their father, Charles Martel. Pepin, in charge of the whole kingdom under the nominal rule of the last Merovingian king, Childeric III, had evidently decided to give his half-brother, now years wiser, a second chance. Perhaps Pepin had visited Grifo during his imprisonment, and in their talks together the younger man had convinced the older of his readiness to serve the man and the kingdom.
Pepin assigned Grifo twelve counties in western Neustria, with a capital at Le Mans. This was no mere sinecure, a backwater outpost of no value. Grifo’s lands would act as a bulwark to the Bretons to the west and the Aquitanians to the south. If need arose this duchy could be a springboard to invade either region. All in all a fine collection of lands, of strategic and political import, and the source of a lot of revenue.1.Bachrach, Early Carolingian Warfare, p.43. But as the Royal Frankish Annals note, “Grifo… did not want to be under the thumb of his brother Pepin, although he held an honorable place.”2.RFA, 747.