In 'Betrayed Armenia,' the Armenian writer and humanitarian Diana Abgar presented an accurate report of the Armenian massacres. The massacre took place in the Adana Vilayet of the Ottoman Empire in April 1909. The slaughter of Armenian Christians by Ottoman Muslims in the city of Adana amid the Ottoman countercoup of 1909 grew into a series of violent anti-Armenian riots throughout the province. As a result, approximately 20,000 to 25,000 people were killed in Adana and surrounding towns, mainly Armenians.

In this valuable work, Abgar excellently describes the reasons for the inhumane killings, the evidence against the responsible parties, and many more unknown facts about the events. It's an insightful work and a must-read for anyone interested in knowing the history of Armenia.