By the summer of 1704 Louis XIV's vast armies dominated Europe. France defeated every alliance formed against her and Louis was poised to extend his frontier to the Rhine and install a French prince on the throne of Spain. Two men saved Europe from French military domination: the Duke of Marlborough and Prince Eugene of Savoy. Marlborough masterminded a brilliant campaign, working with Eugene to surprise the French invaders inside Germany. The rival armies clashed in August and the hitherto unbeaten French were utterly destroyed. Blenheim was a major turning point in European history. Charles...