Adal’s removal to Aussa failed to save it from destruction
Evidence
In these circumstances Adal declined rapidly, and from Harar the capital was transferred in 1577 to the oasis of Aussa in the scorching Danakil deserts where it was hoped to be secure from further Abyssinian attack. Here, however, it was regularly harried by the Galla invaders who by this time had swept through Abyssinia; and it was ultimately overthrown by the local nomadic Danakil (‘Afar), its ancient dynasty disappearing towards the end of the seventeenth century. — I.M. Lewis, I. M. Lewis, A Modern History of the Somali_ Nation…, 101