Erzieher des Preußischen Heeres
Erzieher des Preußischen Heeres (Educators of the Prussian Army) is the title of a German historical book series from the early 20th century that presents biographies and works of significant military figures of Prussia. It was edited by the Prussian officer (Lieutenant General) and military writer Gerhard von Pelet-Narbonne (de) (1840-1909) and renowned German military officers contributed to the creation of the collection.
Source: Wikipedia — Erzieher des Preußischen Heeres (CC BY-SA 4.0)