The Guns of August Addressed is prewar military planning, as done by the major powers in Europe. Included are the German Schlieffen plan, France's offensive Plan XVII, joint British and French arrangements, and Russia's approach to a future European war. "Outbreak" starts with a short introduction, which briefly mentions the event that triggered World War I. On June 28, 1914, in Sarajevo, Gavrilo Princip, a Serbian nationalist, assassinated the heir apparent to the throne of Austria-Hungary, the Archduke Franz Ferdinand and his wife Sophie, Duchess of Hohenberg. European-wide diplomacy and military preparations during July are then referenced. Chapters 6 to 9 commence with August
Assassination of Archduke Franz Ferdinand café with the words 'Mehmedbašić who to-morrow is to be with us.'" The three sent a postcard to Black Hand Provincial Director for Bosnia-Herzegovina Vladimir Gaćinović in France. The following morning, on 28 June 1914, Ilić positioned the six assassins along the motorcade route. Ilić walked the street, exhorting the assassins to bravery. On the morning of 28 June 1914, Franz Ferdinand and his party proceeded by train from Ilidža Spa to Sarajevo. Governor Oskar Potiorek met the party at Sarajevo station. Six automobiles were waiting. By mistake, three local police officers got into the first car with the chief