was killed by al-Ghazi. However, both polities exhausted their resources and manpower in this conflict, allowing the northward migration of the Oromo into their present homelands to the north and west of Addis Ababa. Many historians trace the origins of hostility between Somalia and Ethiopia to this war. Modern period Greek War of Independence The Greek War of Independence (1821–1829) has sometimes been considered a religious war between Christians and Muslims, especially in its early phase. The Greek Declaration of Independence (issued on 15 January 1822) legitimised the armed rebellion against the Ottoman Empire in a mix of religious and nationalist terms: 'The war we are waging against the Turks, far from being founded in demagoguery, seditiousness or the selfish interests of any one part of the Greek nation, is a national and holy war (...). It is from these principles of natural rights and desiring to assimilate ourselves with our European Christian brethren, that we have embarked upon our war against the Turks.' Scottish writer Felicia Skene remarked in 1877: 'The Greek war of independence has never been called a religious war, and yet it had a better claim to that appellation than many a conflict which has been so named by the chroniclers of the past. It is a significant fact that the standard of revolt was raised by no mere patriot, but by Germanus, the aged Archbishop of Patras, who came forward, strong in his spiritual dignity (...) to be the first champion in the cause of Hellenic liberty.' Ian Morris (1994) stated that 'the uprising in 1821 was mainly a religious war', but that philhellene Western volunteers joined the war for quite different reasons, namely to 'regenerate' Greece and thereby Europe, motivated by Romantic ideas about European history and civilisation, and Orientalist views of Ottoman culture. The Filiki Eteria, the main organisation driving the rebellion, was split between two groups: one advocated the restoration of the Byzantine Empire on religious grounds, and to encourage all Christians within Ottoman territory to join the Greek revolutionaries; the other advocated the Megali Idea, a large Greek nation-state based on shared language rather than religion. Both of these grand objectives failed, but a smaller version of the latter goal was accepted by most members of the Eteria by 1823, and this goal was generally compatible with the motives of philhellenes who travelled to Greece to enter the war in 1821–23.