1914
Gavrilo Princip, a member of the Serbian nationalist group known as the Black Hand, assassinated Archduke Franz Ferdinand and his wife, Sophie, in Sarajevo on June 28, 1914. However, a failed assassination attempt earlier in the day by Nedeljko Čabrinović, another member of the Black Hand, prompted Franz Ferdinand's decision to alter his travel route, leading him directly to Princip.
Gavrilo Princips assassinated Archduke Franz Ferdinand June 28th 1914
Gavril Princip actually killed Franz Ferdinand but i dont know who tried to kill him first
They had a plan to execute him but they all failed until fait gave Gavrilo princip another chance when Franz Ferdinand's driver accidentaly took a wrong turn which took him straight to gavrilo so he shot him and his wife on the spot. his wife was pregnant and it was their anninversary. also was first time his wife sat with him in public.