sentences:  From mid-2015 to 2019, Geddo has been Representative to Iraq, leading the UNHCR emergency preparedness and response to the rolling displacement crisis in the run up to the liberation of Mosul in mid-2017, in the framework of the UN coordination system.In all, a total of five million internally displaced people were recorded over a four year period, one of the largest and most complex humanitarian crises in the world.At the same time, Geddo oversaw the UNHCR operation to support reintegration of those internally displaced families who had started to return to their areas of origin after the conflict was over.