A Serbian nationalist Gavrilo Princip's assassination of the heir to Austria-Hungary throne on 28 June 1914 in Sarajevo was the last straw for the outbreak of the World War I. Your answer: False True Clear answer

True. The assassination of Archduke Franz Ferdinand of Austria-Hungary by Gavrilo Princip, a member of a Serbian nationalist group, was indeed the immediate catalyst that triggered the outbreak of World War I. This event set off a chain reaction of alliances and conflicts that led to the war.