Complex sentence: By the 13th century, Turkmens formed a part of the armies of Damascus and Aleppo, where lived in the districts of the latter-including a suburb of the city called al-Hadir al-Sulaymani.
Split into simpler sentences: By the 13th century, Turkmens formed a part of the armies of Damascus and Aleppo. They lived in the districts of the latter, including a suburb of the city itself called al-Hadir al-Sulaymani.