Columbia subject headings:
Canada--History--1841-1867.
Canada--Relations--United States.
Canadians--United States--History--19th century.
United States--History--Civil War, 1861-1865--Participation, Canadian.
United States--Relations--Canada.
Harvard subject headings:
Canada--History--1841-1867.
Canada--Relations--United States.
Canadians--United States--History--19th century.
United States--History--Civil War, 1861-1865--Participation, Canadian.
United States--Relations--Canada.
Princeton subject headings:
Canada--History--1841-1867.
Canadians--United States--History--19th century.
United States--History--Civil War, 1861-1865--Participation, Canadian.