Original sentence: He secured the support of his father's former allies and enjoyed initial successes before getting soundly defeated in an engagement against an army led by the famed Warrior-Emperor Yeshaq I of the Abyssinians
Edited sentence: An unnamed commander with ten chiefs, each in charge of 20,000 men, moved into area for a year hoping to restore the lost "Amhara rule".Defeating them in Zikr Amhara (Memory of the Amhara), also at the district of Serjan.Even though they were outnumbered by the soldiers of the Christian state, they fought several successful battles.He entrusted his brother Muhammad with the task of capturing a fort at Barut and then instructed one of his commanders, Omar to raid the land of Jab.He later proceeded towards the Emperor's headquarters, where a fierce battle was fought in which many Christian nobles fell, after which Sabr ad-Din put their headquarters up in flames.Sabr ad-Din and his brothers made their way to a place called Sayara, where they were joined by a number of their fathers former followers.Sabr ad-Din seized a considerable amount of booty, then subsequently ruled the district for some time.Sabr ad-Din was able to send his brother Muhammad with Harb Jaush, a defector from the Christian side, to attack the imperial forces.Scattering their enemies, they burnt houses and churches and seized much booty in gold and other valuables.Such destruction and opposition on the eastern borders angered the Christian rulers of the empire.The Emperor's commander and many other Christian leaders fell in battle and their soldiers were killed, except for a few of them who managed to escape.The Muslims forces later regained their strength.This caused Sabr Ad-din and his followers to flee and endure hunger, thirst and other deprivations.This was so well defended by the imperial forces as by their sheer number as Maqrizi relates as "numerous as locusts", Omar's men were all killed by spears.Victorious the King then returned to his capital, but gave the order to his many followers to continue and extend the war