Gavrilo Princip (July 25, 1894 - April 28, 1918) was a Bosnian Serb who assassinated Archduke Franz Ferdinand of Austria and his wife, Sophie, Duchess of Hohenberg, on June 28, 1914. Princip and his accomplices were arrested and implicated by a number of members of the Serbian military, which was used as pretext for Austria-Hungary's invasion of Serbia, which then led to WWI. Princip was a Yugoslav nationalist associated with the movement Mlada Bosna (Young Bosnia). He was too young to receive the death penalty, so he received the maximum sentence of twenty years in prison. He was held in harsh conditions which were worsened by the war. He contracted tuberculosis. He died in 1918 at the age of 23. At the time of his death, weakened by malnutrition and disease, he weighed under 90 pounds. His body had become racked by skeletal tuberculosis that ate away his bones so badly that his right arm had to be amputated.