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because he was heir to the Austrian-Hungarian Throne and was murdered by a serbian, so the hungarians (who were allied with Germany) declared war on Serbia who were allied with the Russians who were allied with Great Britain and France and that's what started it.
What else can I help you with?
What main event caused WW1?
the assassination of the Archduke Franz Ferdinand
What was the event that started world war 1?
assassination of Franz Ferdinad and his wife
What event actually started the fighting in the ww1?
The assassination of archduke Franz Ferdinand
What event in Sarajevo led to WW1?
the assassination of Franz Ferdinand and his wife Sophie.
What one event started World War 1?
The assassination of Franz Ferdinand
What event started World War One?
The single event that started a chain of other events that led to World War 1 was the assassination of Archduke Ferdinand. This event took place in June of 1914. Archduke Ferdinand was the heir to the Austro-Hungarian throne.
How the assassination was just the 'trigger event that caused World War 1?
Franz Ferdinand
What event spark war world 1?
The assassination of Arch Duke Franz Ferdinand.
What event started shooting of world war 1?
The assassination of Arch Duke Franz Ferdinand.
Was the assassination of Franz Ferdinand a trigger event?
Yes, it was the spark that began World War One.
What big event sparked World War 1?
The assassination of Arch Duke Franz Ferdinand.
Who was assassinated during the event who sparked Austria to declare war on Serbia setting off World War 1?
Killing of Princ Ferdinand by Gavrilo Princip member of Youth Bosna
