 Complete the following phrase:  Harun himself, with the other half of his forces, went west and captured the strongly fortified city of Herakleia after a month-long siege in August or September. The city was plundered and razed, and its inhabitants enslaved and deported to the Caliphate. The fall of Herakleia was considered by the Arab chroniclers the most significant achievement of Haruns expeditions against the Byzantines, and is the central event in the narratives of Haruns retaliatory campaign against Nikephoros. As the historian Marius Canard remarks, for the Arabs the capture of Herakleia had an impact as profound as the 