Aleppo (Halab, حلب in Arabic, Haleb in Armenian) a city today in northwestern Syria, was a major site on the deportation map. It was not only a killing station but a transfer point, where those who had survived deportation from points north could find refuge if they were lucky. The reports from Jesse Jackson in Aleppo in 1915-16, like Leslie Davis's, comprised a primary source of evidence for Ambassador Morgenthau, and eventually for the State Department and the press back home. Being in Aleppo, Jackson afforded a unique overview of the extermination plan, because week in and week out, he saw the remnants of the endless string of deportation marches that had originated all over the empire.
Christians belonging to a dozen different congregations (with prevalence of the Armenian and Orthodox denominations) represent between 15% and 20% of Aleppos population.