sentences:  After a three months period of armed conflicts, the European Powers intervened and asked for negotiations on a new basis.On May 17 the state of Northern Epirus was internationally recognized by the Protocol of Corfu, as an autonomous region inside the borders of Albania.However, this state was short lived and on October 27, when World War I broke out and the Albanian government collapsed, the Greek army re-entered the area with the sanction of the Great Powers.