Columbia subject headings:
Military service, Voluntary--United States--History--20th century--Congresses.
United States--Armed Forces--Recruiting, enlistment, etc.--Congresses.
Harvard subject headings:
Military service, Voluntary--United States--History--20th century--Congresses.
United States--Armed Forces--Recruiting, enlistment, etc.--Congresses.
Princeton subject headings:
Military service, Voluntary--United States--History--20th century--Congresses.
United States--Armed Forces--Recruiting, enlistment, etc.--Congresses.