Rest assured they'll be back and Ethiopia will pay dearly.
Ethiopia will be suing for peace in a year. The Islamic suicide bombers will hit the Ethiopian capital with a vengeance.
The Islamics have patience. They melt away and return when the fighting stops.
It's hard for a terrorist to 'melt away' if the standing orders are to eliminate any population group in which the terrorist might 'melt away' into...
Ethiopia really should offer the Hutus from Rwanda some 'Somali territory' for them to come in and 'deal' with the Islamic problem. Then annex Somalia, for it would finally give Ethiopia an ocean border.