Belisarius returned to Constantinople with the Vandals' royal treasure and the captive Gelimer to enjoy a triumph, while Africa was formally restored to imperial rule as the praetorian prefecture of Africa. Imperial control scarcely reached beyond the old Vandal kingdom, however, and the Moorish tribes of the interior proved unwilling to accept imperial rule and soon rose up in rebellion. The new province was shaken by the wars with the Moors and military rebellions, and it was not until 548 that peace was restored and Roman government firmly established.