Uqba ibn Nafi
The exarchate scored a major victory over the forces of Uqba ibn Nafi at the Battle of Vescera in 682, aided by the Berber king, Kusaila. This victory forced the Muslim forces to retreat to Egypt, giving the exarchate a decade's respite. However, the repeated confrontations took their toll on the dwindling and ever-divided resources of the exarchate.