Original sentence: He continued the insurgency against Emperor Yeshaq I and enjoyed some success before getting defeated and surrendering to the Emperor's army along with his brother Muhammad, and once more the former lands came under the rule of the Solomonic dynasty
Edited sentence: Early in his reign he launched an expedition against an Ethiopian Christian monarch, Emperor Dawit and drove him to Yedaya which was described as his royal seat, destroyed the Solomonic army , where according to Maqrizi, he was captured and killed.He besieged them for two months by the end of which they were suffering from hunger and thirst.He then offered them an ultimatum of embracing Islam or return to their homes.His death however presumed to be an event of major importance, is not recorded by the Ethiopian Chronicles.In 1424 another Christian monarch , Emperor Yeshaq, set forth with an huge army which Maqrizi likens to a swarm of locusts.Mansur and his brother Muhammad were captured and once more the former lands came under the rule of the Christian Amhara.Mansur later made his way towards to Moha mountains where  surrounded a considerable imperial force of 30.000 soldiers.Some 10.000 accepted the new faith of Islam; the remaining ones went home.Soon after this the fortunes of war again changed.The Ethiopian historian Taddesse Tamrat argues it's because the Ethiopian royal chronicles often deliberately attempted to suppress the violent deaths of the kings whose reigns they extol