Serbia was blamed for the assassination. While the government has stated that they were never involved with the killing, most believe that the Black Hand (the gang that trained to assassinate Archduke Ferdinand) were called upon by the government.
Archduke Franz Ferdinand was the heir of the Austro-Hungarian throne, born in Austria-Hungary whose murder would later be the triggering event for World War 1 to begin. (he was murdered in Sarajevo on June 28th 1914)
The assassins were from a terrorist group called the Black Hand Gang, this gang came from Serbia, but the actual assassination took place in what is now Bosnia.
Serbia, if you think of it like that.
Archduke Ferdinand was killed by an assasin sent by a Serbian Nationalist group called the Black Hand. Serbia as a whole was blamed by the Archduke's country, but the Assasin who pulled the trigger was named Gavrilo Princip.
Franz Ferdinand was assassinated in Sarajevo in current Bosnia. Yugoslavia
Gavrilo Princip a Serbian Student
because when archduke was assinated austria-hungary blamed Serbia and so attacked them then Russia being part of a alliance helped them and then all the other countries got involved and turned into the first world war
Austria-Hungary blamed Serbia for the assassination. The assassination happened in Bosnia, which was ruled by Austria-Hungary at the time; Bosnian separatists murdered the Archduke with some assistance from Serbian intelligence officials. The Austrian government, of course, found out about this and was not too happy.
Serbia
To simplify a complicated chain of events : the Archduke is assassinated, Serbia is held responsible by Austria/Hungary. Russia supports Serbia. Germany supports Austria/Hungary. France supports Russia, & Britain joins in to support France. Turkey joins the central powers. Rumania joins the Allies. Bulgaria joins the central powers. Italy & the US join the Allies.
It was the assassination of arch duke Franz Ferdinand, that caused it all. Germany did not start the war, but then were blamed for it in the treaty.
The assasination of Archduke Franz Ferdinand, heir to the throne of Austria-hungary. He was killed by Gavrillo Princip, a slavic nationalist in Sarahevo, Bosnia in 1914. Austria-Hungary used this as an excuse to invade Bosnia.
Franz Ferdinand did not start the war. Gavrilo Principe assassinated him in Sarajevo. This caused WW1 as Austria-Hungary blamed the Serbs. Russia jumped in to help the Serbs. Germany attacked France. Germany moved into neutral Belgium so Britain declared war.
The assassination started the diplomatic crisis that led to the outbreak of World War I. The Archduke was the heir to the throne of Austria-Hungary; Austria-Hungary blamed Serbians for helping with the assassination. After negotiations and ultimatums failed, Austria-Hungary declared war on Serbia, which set off a chain reaction of alliances that began the World War.
Germany was given all blame for ww1 in clause231 A of the treaty of Versailles. even though the assasination of Archduke franz Ferdinand started the war who was the heir to the Austro-Hungarian throne.