Complex sentence: This victory of Fakhr ad-Din allowed him to reign over a large Emirate extending from Aleppo in the north of Ottman Syria to Arish in northern Sinai for 10 years, before he was defeated and excuted by the Ottomans.
Split into simpler sentences: This victory of Fakhr ad-Din allowed him to reign over a large Emirate in Ottoman Syria extending from Aleppo in the north to Arish in northern Sinai. His Emirate lasted for 10 years before he was defeated and excuted by the Ottomans.