The events of the Hamidian massacres and Sultan Abdul Hamid II 's continued anti-Armenian policies gave way for the Armenian Revolutionary Federation to plan an assassination attempt on the sultan to enact vengeance . Dashnak members , led by ARF founder Christapor Mikaelian , secretly started producing explosives and planning the operation in Sofia , Bulgaria . The assassination attempt was unsuccessful in killing Abdul Hamid II , although it resulted in the death of 26 people and a further 58 wounded
assassination attempt
Yıldız assassination attempt
Armenians in the Ottoman Empire