 Describes the Treaty of Alliance (1778) and the roles served by Americans Arthur Lee, Silas Deane, and French Charles Gravier, comte de Vergennes and Conrad Alexandre Gérard de Rayneval.Describes the 1803 Louisiana Purchase and the roles served by French Charles Maurice de Talleyrand-Périgord and François Barbé-Marbois and the Americans James Monroe and Robert Livingston.Describes the 1814-15 Congress of Vienna and Britain's Robert Stewart, Viscount Castlereagh, Prussia's Karl August, Grand Duke of Saxe-Weimar-Eisenach, Russia's Karl Nesselrode, France's Charles Maurice de Talleyrand-Périgord, and Austria's Klemens von Metternich.