Columbia subject headings:
East Asia--Foreign relations.
Imperialism.
Korea (South)--Foreign relations--2002-
National security--East Asia.
National security--Korea (South)
United States--Foreign relations--2017-2021.
Harvard subject headings:
East Asia--Foreign relations
Imperialism
Korea (South)--Foreign relations--2002-
National security--East Asia
National security--Korea (South)
United States--Foreign relations--2017-2021
Princeton subject headings:
East Asia--Foreign relations.
Imperialism.
Korea (South)--Foreign relations--2002-
National security--East Asia.
National security--Korea (South)
United States--Foreign relations--2017-.