Oromo migrations have effectively split this putative ethnolinguistic block to the Lake Zway islands, Gurage territory, and Harar.[20] Following the decline of the Adal Sultanate's ascendancy in the area, a large number of the Harari were in turn reportedly absorbed into the Oromo community.[19] In the Emirate of Harar period, Hararis sent missionaries to convert Oromo to Islam.[21] The loss of the crucial Battle of Chelenqo marked the end of Harar's independence in 1887.[22] Hararis supported the designated but uncrowned Emperor of Ethiopia Iyasu V, and his presumed efforts to make Harar the capital of an African Islamic empire.[23] Iyasu was however overthrown in 1916, and many of his Harari followers were jailed.[24]