Columbia subject headings:
Harvard subject headings:
Afghanistan--History--2001-2021
Germany--Armed Forces--Afghanistan--History--21st century.
Germany--History, Military--21st century.
National security--Germany--History--21st century.
Princeton subject headings:
Afghanistan--History--2001-2021.
Germany--Armed Forces--Afghanistan--History--21st century.
Germany--History, Military--21st century.
National security--Germany--History--21st century.