Because Archduke Ferdinand disapproved of the Slavic people forming their own country. They were too afraid of him controlling the country.
Also, Black Hand wanted independence for Slavic countries, and assassinating the Archduke got them attention. This was more likely to get them what they wanted (or so they thought).
Archduke Franz Ferdinand was Austrian. Not german.
The Black Hand
The heir to the Austro-Hungarian Empire Archduke Franz-Ferdinand was assinated by a Serbian Nationalist group called The Black Hand.
I don't know that it was State sponsored as such: Gavril Prinzip was a Serbian.
Archduke Frerinand and his wife of Austria-Hungary.
Archduke Franz Ferdinand was Assassinated in Serbia.
Gavrilo Princip was a supporter of Serbia gaining independence from Austria. The Archduke Franz Ferdinand wanted to include Serbia with Austria.
Gavrilo Pricip shot the Arch Duke Franz Ferdinand in Serbia.
Franz-Ferdinand was assassinated by the Black Hand, a Serbo-Bosnian terrorist group that wanted Bosnia to be given to Serbia from Austria-Hungary.Specifically, Gavrilo Princip shot Franz-Ferdinand and his wife.
In Sarajevo, then in Serbia, now capital of Bosnia-Hercegovina.
Archduke Ferdinand was killed because he was an important Austro-Hungarian prince, and that empire controlled Serbia which had an independence Resistance group who felt that killing the Archduke would force the Austrians to give control of Serbia to the Serbians.
Serbia, when Archduke Franz Ferdinand of Austria was assassinated.
They declared war on Serbia.
Archduke Franz Ferdinand was assassinated by a member of the Serbian Black Hand Gang called Gavrilo Princip.
Franz Ferdinand, the archduke of Austria-Hungary.
Archduke Franz Ferdinand was Austrian. Not german.
It was Franz Ferdinand. It was important because once he had been killed the Austrians declared war on Serbia.