Columbia subject headings:
Communication in politics--Europe--History.
Europe--History, Military--1492-1648.
Europe--History, Military--1648-1789.
International law--Europe--History.
Politics and war--Europe--History.
Harvard subject headings:
Communication in politics--Europe--History.
Europe--History, Military--1492-1648.
Europe--History, Military--1648-1789.
International law--Europe--History.
Politics and war--Europe--History.
Princeton subject headings:
Communication in politics--Europe--History.
Europe--History, Military--1492-1648.
Europe--History, Military--1648-1789.
International law--Europe--History.
Politics and war--Europe--History.