Amda-Siyon (131U“13UU) was the founder of the powerful Christian empire. His wars were accompanied “by carnage and destruction which sent tribes and groups fleeing from the storm centre, abandoning their territory, to seek refuge in difficult areas, where geographic features and distance from the zone of conflict held out hope of asylum. This altered the pattern of ethnic distribution during his reign. There are a number of indications which, beyond a shadow of doubt, establish that some groups, including some Oromo groups, who arrived in the region earlier, were forced to flee from the storm centre. The establishment of a number of Christian military colonies, in Bali, Dawaro, Fatagar, Hadiya, Waj and other areas, acted as a powerful flam that checked the flow of pastoral Oromo from the southern region to the central highlands.