At the Assembly of Narbonne in 849, Aleran and Isembart were empowered to consolidate the territory for the Frankish Kingdom and bring the Hispanic Marches held by rebel forces loyal to Pepin II back into control of the kingdom.
In 849, Aleran and Isembart were granted authority to unify the Frankish Kingdom's territory and reclaim the Hispanic Marches held by Pepin II's rebellious forces.