Columbia subject headings:
Harvard subject headings:
Prussia (Germany)--History, Military--19th century.
Prussia (Germany)--Military policy--History--19th century.
Prussia (Germany). Armee--History--19th century.
Princeton subject headings:
Prussia (Germany)--History, Military--19th century.
Prussia (Germany)--Military policy--History--19th century.
Prussia (Germany). Armee--History--19th century.