Nedeljko Čabrinović not enough to pay for rent and food, let alone books, which, for Čabrinović, were "the only sign of life." In the meantime, he met Gavrilo Princip, and joined the Black Hand in 1912. Two years later, Dragutin Dimitrijević leader of the Black Hand, ordered Čabrinović, Gavrilo Princip and five other conspirators to assassinate Austro-Hungarian Archduke Franz Ferdinand, giving them each a gun and two bombs. On Sunday, 28 June 1914, Archduke Franz Ferdinand of Austria and his wife Sophie, Duchess of Hohenberg were assassinated in Sarajevo by Gavrilo Princip during a visit that had been announced two months prior.
Serbia to become an anchor for unification of all South Slavs, and the relationship between the two countries became tense. The assassination of Archduke Franz Ferdinand of Austria on 28 June 1914 in Sarajevo by Gavrilo Princip, a member of the Young Bosnia organization, led to Austria-Hungary declaring war on Serbia. In defense of Serbia, and to maintain her status as a Great Power, Russia mobilized its troops, which resulted in Austria-Hungary's ally Germany declaring war on Russia. Serbia won the first major battles of World War I, including the Battle of Cer and Battle of Kolubara – marking the first