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
Prince Ernst of Hohenberg Prince Ernst of Hohenberg Prince Ernst of Hohenberg ("Ernst Alfons Franz Ignaz Joseph Maria Anton von Hohenberg"; 27 May 1904 – 5 March 1954) was the second son of Archduke Franz Ferdinand of Austria and his morganatic wife Sophie, Duchess of Hohenberg, who were assassinated at Sarajevo in 1914. Prince Ernst was born at his parents' estate at Konopiště in Bohemia. Following his parents' assassination, which precipitated World War I, Ernst and his siblings, Sophie and Maximilian, were taken in by their uncle, Prince Jaroslav von Thun und Hohenstein. In late 1918, their properties in Czechoslovakia, including Konopiště and Chlumec