Columbia subject headings:
Brazil--Boundaries.
Brazil--Foreign relations.
Brazil--Territorial expansion.
Harvard subject headings:
Brazil--Foreign relations--Rio de la Plata Region (Argentina and Uruguay)
Geopolitics--Brazil.
Rio de la Plata Region (Argentina and Uruguay)--Foreign relations--Brazil.
Rio de la Plata Region (Argentina and Uruguay)--History.
Princeton subject headings:
Brazil--Boundaries.
Brazil--Foreign relations.
Brazil--Territorial expansion.