 He began his reign by sending an army under the command of his brother to enforce his authority in Afghanistan, which resulted in the capture of Sebük-eri's brother Ghalib.Al-Mu'addal then campaigned in Ghazna and, together with support sent by his brother, imposed al-Layth's authority in parts of Afghanistan by the end of the year.In February 910 al-Layth left Zarang at the head of an expedition against Sebük-eri.