Columbia subject headings:
Argentina--Foreign relations.
Argentina--History--1817-1860.
Obligado, Battle of, Argentina, 1845.
Uruguay--History--1830-1875.
Harvard subject headings:
Argentina--Foreign relations.
Argentina--History--1817-1860.
Obligado, Battle of, Argentina, 1845.
Uruguay--History--1830-1875.
Princeton subject headings: