Olol Dinle (Somali: Olol Diinle)^[1] was a Somali sultan who ruled Kelafo as the head of the Ajuran. He successively offered allegiance to the Kingdom of Italy in the 1920s and was named "Sultan of Sciavelli (Shabelle) and Auia (Hawiye)" in the early 1930s.^[2]

Olol Dinle was crowned sultan in 1922 and his Sultanate was out of the upper reaches of the Webi Shabelle, centered at Kelafo, the traditional capital at the turn of the 20th century. After Ethiopian Empire invaded his traditional territory, Sultan Olol Dinle sought the alliance of Italy in the 1920s. The Italians dubbed him the "Sultan of Sciavelli (Shabelle) and Auia (Hawiye)" in the early 1930s.^[3]

Sultan Olol Dinle was a descendant of the Ajuran conquerors whose deeds were lost in the mists of time.^[4]

The expansion of Ethiopian control deep into the Ogaden led to the capture of Kelafo, leaving Olol Dinle with a very small patch of territory on the Ethiopian side of the border between Ferfer and Kelafo. This tiny patch of land along the Shabelle River was strategically critical, however, as any invasion of Ethiopia from central or southern Somaliland would have to go through this area. Sultan Orfa was placed in control of Kelafo, but Olol Dinle's attacks against Ethiopian forces were so serious that Ethiopian government intervention was required to avoid famine along the Shabelle.^[5]

In recognition of Italy's alliance with Olol Dinle, he was dubbed the "Sultan of the Sciaveli (Shabelle)" in the 1930s.^[6] Olol Dinle was only too happy to receive Italian aid against Ethiopia, as his father remained in an Ethiopian prison and the Ethiopian flag flew above his people's ancestral capital of Kelafo.

Ethiopia took to supporting Omar Samatar's raids into Italian Somaliland, the former general of the Sultanate of Hobyo seeking a similar goal as that of Olol Dinle in that he sought to reinstate Majerteen clan rule in Hobyo.

In 1931, the Dejazmach ("Commander of the Gate") of Harar, Gebremariam, to whom the Ogaden had been assigned, attacked and destroyed Olol Dinle's fortress at Mustahil and menaced the Italian Rezidenza at Beledweyne, though Gebremariam avoided armed confrontation and withdrew.^[7]

To prevent further raids by Olol Dinle, a large force under Balambaras ("Commander of the Fortress") Afawarq Walda Samayat was deployed in Kelafo from Jigjiga in 1933, as Olol Dinle's forces of roughly a thousand Dubat cavalry had grown to pose a serious threat to Ethiopian control of the Shabelle River area.

During the Second Italo-Ethiopian War, Olol Dinle's forces along with the Italians under then-colonel Luigi Frusci invaded Ethiopia from Hiraan, and attacked the forces of Dejazmach Beine Merid (also spelled Beyene Merid) at Goba.

Forces loyal to Sultan Olol Dinle pushed 350 kilometers inside Ethiopia, attacking the forces of Dejach Beyene Merid at Goba, and destroying all the villages supporting the Ethiopian government.^[8]

In the Battle of Ganale Doria Forces loyal to Sultan Olol Dinle clashed with the forces of Ras Desta's Army of Bale and Dejazmach Beine Merid both sides eventually withdrew from the battlefield, with Beine Merid seriously wounded. Its commander-stricken, the army of the Bale retreated, leaving the army of the Sidamo on its own.^[9] Sultan Olol Dinle's forces of about 1,000 dubats defeated a 4,000 strong army led by Dejazmach Beine Merid. This victory was the reason Sultan Olol Dinle was invited to Italy in 1938.^[10]

Sultan Olol Dinle was executed during the early 1960s in Addis Ababa by Haile Salassie due to accusations of him collaborating with the Italians against Ethiopia.^[1][11] He allegedly was a “loyal ally” of Italy, and regularly used to betray the imperial government of Ethiopia.^[12]

• Second Italo-Ethiopian War