A man who had earlier failed in committing this action attempted to commit suicide, but his cyanide pill had expired and the river he jumped in was only inches deep.
A man who had earlier failed in committing this action attempted to commit suicide, but his cyanide pill had expired and the river he jumped in was only inches deep. People accused of planning this event were tried three years after it occurred in the Salonika Trial, which condemned to death the planner of this event, codenamed Apis. This event led to the issuance of an ultimatum that was meant to be rejected, precipitating the July Crisis. The nationalist organization Black Hand planned this event, though it was actually carried out by Gavrilo Princip. For 10 points, name this June 1914 event in which a Serbian nationalist killed the heir to the Austrian throne that triggered World War I. 
A man who had earlier failed in committing this action attempted to commit suicide, but his cyanide pill had expired and the river he jumped in was only inches deep.
assassination of Archduke Franz Ferdinand