Between 1 million and 1.5 million Armenians are estimated to have been killed. The extermination of the Armenian population took place in two stages. First the able-bodied men were murdered or worked to death through forced labour then the women, children, elderly and sick were led on death marches into the Syrian dessert and left there with no food or shelter. Many died on the way to the dessert and still more died of starvation and disease once they arrived. Other Christian minorities in the Ottoman Empire were targeted for extermination in a similar way at the this time including the Greeks and the Assyrians.
The remains of Armenians massacred at Erzinjan. (photo care of Wikipedia)