Jakob Künzler, head of a missionary hospital in Urfa, documented the large scale ethnic cleansing of both Armenians and Kurds under the Three Pashas during World War I. He gave a detailed account of deportation of Armenians from Erzurum and Bitlis in the winter of 1916. The Armenians were perceived to be subversive elements (a fifth column) that would take the Russian side in the war. In order to eliminate this threat, the Ottoman government embarked on a large scale deportation of Armenians from the regions of Djabachdjur, Palu, Musch, Erzurum, and Bitlis. Around 300,000 Armenians were forced to move southwards to Urfa and then westwards to Aintab and Marash. In the summer of 1917, Armenians were moved to the Konya region in central Anatolia. Through these measures, the CUP leaders aimed to eliminate the Armenian threat by deporting them from their ancestral lands and by dispersing them in small pockets of exiled communities. By the end of World War I, up to 1,200,000 Armenians were forcibly deported from their home vilayets. As a result, about half of the displaced died of exposure, hunger, and disease, or were victims of banditry and forced labor.