 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.The Second Constitutional Era of the Empire began shortly after Sultan Abdülhamid II restored the constitutional monarchy after the 1908 Young Turk Revolution.