sentences:  Father Hannan served through the end of the European theater of war and afterward as they began to uncover the Nazi horrors during the liberation of starved prisoners at the Wöbbelin concentration camp.After the war, Father Hannan served briefly as pastor of Cologne Cathedral during the American occupation of Germany.He returned to the United States and served for a time as an assistant priest at Saint Mary Mother of God parish in Chinatown (in Washington, D.C.) in the Archdiocese of Baltimore-Washington.