Who assassinated archduke franz ferdinand

Arch duke Franz Ferdinand was the was the heir to the throne Of Austro-Hungarian Empire.He was Assassinated on 28th June 1914 by Gavrilo Princip. He belonged to the black hand secret society. The motive of the attack was to to break off the Southern half of his empire known as South Slav Provinces to form Yugoslavia. Later the movement was known as young Bosnia. It was the event which led to the World War One.

arresting and exicuting citizens