Answer:
Gavrilo Princip was a Serb nationalist who shot Archduke Franz Ferdinand of Austria and triggered the First World War.
Step-by-step explanation:
Princip strongly believed that Serbia was compelled to support unify the South Slavic peoples as an independent nation. He called for the unification of all Yugoslavs against the Austro-Hungarian rule in Bosnia and Herzegovina.
The nationalist sentiment gained traction across the Balkans. Serbian nationalists were angry at what they saw as an aggressive expansion of Austrian and an effort to restrict Serbia's own dominance in the Balkans.