The Prussian General Staff existed unofficially from 1806 and was formally established by law in 1814. In peacetime, it was responsible for the continuous study of all aspects of war and for drafting and reviewing mobilization and campaign plans. Under Helmuth von Moltke, its chief from 1857, it studied the railway network and built it into its deployment plans. After the First World War, Article 160 of the Treaty of Versailles ordered: “The Great German General Staff and all similar organisations shall be dissolved and may not be reconstituted in any form.” The army continued the work under a new name, the Truppenamt.