Gavrilo Princip was a Bosnian Serb member of Young Bosnia who sought an end to Austro-Hungarian rule in Bosnia and Herzegovina. At the age of 19, he assassinated Archduke Franz Ferdinand of Austria and the Archduke's wife, Sophie, Duchess of Hohenberg, in Sarajevo on 28 June 1914. Princip and his accomplices were arrested and implicated as a nationalist secret society, which initiated the July Crisis and led to the outbreak of World War I.
At his trial, Princip stated that: "I am a Yugoslav nationalist, aiming for the unification of all Yugoslavs, and I do not care what form of state, but it must be freed from Austria." Princip was sentenced to twenty years in prison, the maximum for his age, and was imprisoned at the Terezín fortress. He died on 28 April 1918 from tuberculosis exacerbated by poor prison conditions which had already caused the loss of his right arm.