Muslim principality of Ethiopia's Arsi highlands, east of Hadiya, conquered and grouped as a tributary province of the Ethiopian Empire by Emperor Amda Seyon I after crushing a rebellion by its ruler Haydara in the late 1320s.
Remained a contested Ethiopian frontier province through the 15th century (fought over in the Ethiopian-Adal wars); overrun and absorbed during the Oromo migrations of the mid-16th century (by the 1550s, during Emperor Gelawdewos's reign), after which it ceased to exist as a distinct polity.
The atlas holds 6 border frames for Sultanate of Dawaro — the shape you scrub through changes in 1200 · 1270 · 1386 · 1415 · 1496 · 1515.
The standard scholarly account of Amda Seyon's conquest and provincialization of Dawaro, Fatagar, Hadiya and the other Muslim principalities of the medieval Horn (Open Library-verified).
Scholarly study of the southern Ethiopian Muslim principalities (Hadiya, Dawaro, Sharkha, Bale) that Wikipedia's own Sharkha article cites for this cluster of states (Open Library-verified).