Date

Event

1527-1542

A Muslim leader, Imam Ahmed Ibn Ibrahim El-Gazi (Grangn), invaded most of Oromia, Abyssinia and Sidama land, which comprised much of the territory of present day Ethiopia, and changed the balance of power in favor of the Muslims.

1550-mid-1700s

A number of Abyssinian kings tried to militarily defeat Oromo but failed because of the strength of the Oromo cavalry and the unity of the Oromo communities.

~ 1590

A monk by the name Bahrey first wrote about the so-called "Oromo Invasion of Ethiopia," a tale almost invariably accepted by European historians as a fact.