With the annexation crisis of 1908, Austria-Hungary annexed Bosnia and Herzegovina to be part of the AU monarchy. The act provoked anger and revolt among Serbs in Serbia and Bosnia and Herzegovina. In Serbia, the annexation caused great concern, because it was felt that Austria was strengthening its position in the Balkans. Thus, it endangered all hopes for the creation of a future Greater Serbia state. The Serbs never reconciled, and we will see that in the Balkan wars. In the Balkan wars, Austria-Hungary supported the South Slavic peoples in the Balkans to get rid of the Ottomans. In 1911, Dimitrijević and his friends founded the secret association "Unification or Death", known as the "Black Hand". The goal of the organization was to prepare and at the right time raise a revolution for the purpose of overthrowing the Austro-Hungarian monarchy and creating a Greater Serbia. He also controlled the extremist organization "Young Bosnia", which assassinated the AustroHungarian heir to the throne Franz Ferdinand. In the summer of 1914, Gavrilo Princip fatally wounded Franjo Ferdinand and his wife Sofia Chotek with a shot from his pistol, with two bullets. It was the Sarajevo Assassination that would become the occasion of the First World War. The assassination was followed by the July crisis. It is the name for the diplomatic crisis that lasted from June 28 to August 8, 1914. The diplomatic crisis followed as a result of the assassination of the Austro-Hungarian Emperor Franjo Ferdinand in Sarajevo, committed by the Yugoslav terrorist Gavrilo Princip, which led to violent diplomatic and political reactions between Austro-Hungary and the Kingdom of Serbia.