From the wide cornfields of Blenheim in Bavaria to the dark and bloody woods at Malplaquet, the armies led by John Churchill, the 1st Duke of Marlborough met and defeated every general and every army that King Louis XIV of France could put against them. Born into a family impoverished by the English Civil War, Marlborough learned his trade as a soldier in the French Army of the Sun King. Climbing the slippery ladder of success with deft skill, in...