How did the assassination of franz Ferdinand start?

Answer 1

Someone aimed a rifle at him and discharged the weapon subsequently killing him.

I may not know how it started but I think we should think about what it started.

First World War :(

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The plot to assassinate the Archduke started with the Black Hand. Originally they were going to kill the Governor but changed to the Archduke. A number of young men were recruited and a plan to bomb the Archduke was hatched. The assassination attempt failed.

The actual killing was a spur of the moment act. Princips (one of the conspirators) was walking to a deli after the assassination attempt failed. In one of those weird coincidences in life, the Archduke's motorcade took a wrong turn. When the driver braked to backup, Princips found himself facing the Archduke and his wife. He pulled out his 1910 semi-automatic pistol (not a rifle) and fired 2 fatal shots. Ferdinand and his wife were both hit. Sophie died in the vehicle. His last words were "Sophie, Sophie! Don't die! Live for our children!" and he died about 15 minutes later.