Ahmad ibn Ibrahim al-Ghazi
The Argobba and the Harla people seem to have relied on each other in the Islamic period. A power struggle erupted between the Harari dynasty of Abadir Umar ar-Rida and the Walashma dynasty of Argobba throughout the Islamic period until Ahmad ibn Ibrahim al-Ghazi took control of Adal Sultanate by executing the Walashma sultan Abu Bakr ibn Muhammad in the 16th century.