The origins of what would become the German General Staff of the late 19th and 20th centuries probably the most professional military machine in the world can be traced to the Prussian Army of the French Revolutionary and Napoleonic Wars. This concise study, concluding the author's series of five titles on the Prussian Army of 1792–1815, covers the staff; the reforms in tactical employment of all-arms brigades (which, contrary to received opinion, pre-dated the disasters of Jena and Auerstedt in 1806); the artillery and other technical troops; and regimental colours and standards. Among the illustrations are rare diagrams from the artillery drill manual of the day.