Complex sentence: Mokpo belonged to the Mahan confederacy during the early era of the three Han confederacies during the Samhan period, and was called Mul'ahye-gun while under the control of the Baekje kingdom.
Split into simpler sentences: Mokpo belonged to the Mahan confederacy during the early era of the three Han confederacies during the Samhan period. It was called Mul'ahye-gun while under the control of the Baekje kingdom.