Complex sentence: Ebla possessed a wide commercial network reaching as far as modern Afghanistan, it also shipped textiles to Cyprus possibly through the port of Ugarit, but most of its trade seems to have been directed (by river-boat) towards Mesopotamia (chiefly Kish).
Split into simpler sentences: Ebla possessed a wide commercial network reaching as far as modern Afghanistan. It also shipped textiles to Cyprus possibly through the port of Ugarit, but most of its trade seems to have been directed (by river-boat) towards Mesopotamia (chiefly Kish).