Ancient Somali city-states

In antiquity, ancestors of the Somali people were an important link in the Horn of Africa connecting the region's commerce with the rest of the old world. Proto-Somali sailors and merchants were the main suppliers of frankincense, myrrh and spices, items which were considered valuable luxuries by the Ancient Egyptians, Phoenicians, Mycenaeans and Babylonians. During the classical era, several ancient Somali city-states competed with the Sabaeans, Parthians and Axumites for the wealthy Indo-Greco-Roman trade.
The ancient Somali city-states were founded upon an indigenous network involving caravan trades going back approximately four thousand years, and is supported by archaeological and textual evidences. Opone like other city-states such as Avalites, Malao, and Mosylon came into existence with the collapse of the Macrobian kingdom, and could be regarded as successors. Ancient Greek travelers including the likes of Strabo and Cosmas Indicopleustes made visits to the Somali Peninsula between the first and fifth century CE. The Greeks referred to the Somalis as Barbar (βαρ-βαρ) and to their land as Barbaria.
After the Roman conquest of the Nabataean Empire and the Roman naval presence at Aden to curb pillaging, Somali and Gulf Arab merchants by agreement barred Indian ships from trading in the free port cities of the Arabian Peninsula to protect the interests of Somali and Arab merchants in the lucrative ancient Red Sea–Mediterranean Sea commerce. However Indian merchants continued to trade in the port cities of the Somali Peninsula, which was free from Roman interference.
For centuries, Indian merchants brought large quantities of cinnamon to Somalia and Arabia from Ceylon and the Spice Islands. The source of the cinnamon and other spices is said to have been the best-kept secret of Arab and Somali merchants in their trade with the Roman and Greek world; the Romans and Greeks believed the source to have been the Somali peninsula. The collusive agreement among Somali and Arab traders inflated the price of Indian and Chinese cinnamon in North Africa, the Near East, and Europe, and made the cinnamon trade a very profitable revenue generator, especially for the Somali merchants through whose hands large quantities were shipped across sea and land routes.
Aromata was one of the ports that lay in a line along the north Somali coast. Aromata was the sixth port after Zeyla (Aualites), Berbera (Malao), Heis (Moundou), Bandar Kasim (Mosullon) and Bandar Alula (Akannai). It is to be identified with Damo, a site protected on the south but exposed on the north.
In ancient times, Somalia was known to the Chinese as the "Country of Pi-p'a-lo", which had four port cities each trying to gain the supremacy over the other. It had twenty thousand troops between them, who wore cuirasses, a protective body armor.
An ancient document called the Periplus of the Erythraean Sea describes the political system of the city states as being decentralised and lacking a strong centralised government with each port city administered by a tyrannical chief. The vast majority of the settlements were found inshore, each port city had its own unmistakable character, some were unwelcoming to the Romans, others welcoming depending on the conditions and perspectives of the locals. Port cities such as Avalites were described as unruly, whereas other port cities like Malao, the natives were more peaceful. During this period, ruler of Saba and Himyar Charibael is said to have extended his influence further down the east African coast in Sarapion and Azania. By the 2nd century, forces from Himyar invaded Avalites and put the town under siege from which it would not recover until the advent of Islam centuries later.
A ship called the Beden was the principal vessel for traders from the different city-states. It was a fast, durable, double masted ship. The Beden was used as the main trading vessel. The boat was used mainly because of its speed.
The ports of Mosylon, Mundus, Opone, Malao, Avalites and Sarapion, were trading in items such as spices, frankincense, myrrh and cassia. The cities would engage in lucrative trade networks connecting Somali merchants with Phoenicia, Tabae, Ptolemic Egypt, Greece, Parthian Persia, Saba, Nabataea and the Roman Empire. Somali sailors used the ancient Somali maritime vessel Beden to transport their goods.
The Somali coast formed a section of the greater incense trade alongside South Asia and Southern Arabia on the Red Sea. Incense was a sought out product in the Mediterranean region where it would be consistently used during strict religious gatherings, and for other everyday uses, which made incense a noteworthy commodity in the Indian Ocean trade.