In the classical era, several ancient city-states such as Opone, Essina, Sarapion, Nikon, Malao, <answer>Damo</answer> and Mosylon near Cape Guardafui, which competed with the Sabaeans, Parthians and Axumites for the wealthy Indo-Greco-Roman trade, also flourished in Somalia.
Along with Mosylon, Malao, Nikon, Sarapion, Opone and Essina, what city-state flourished in ancient Somalia?
Damo