Answer
The War of the Spanish Succession, fought between 1701 and 1710, pitted Louis XIV of France against the Grand Alliance, led by England and its allies. Marlborough, as commander of the English forces, played a crucial role in the conflict, masterfully defeating the French at the Battles of Blenheim (1704), Ramillies (1706), Oudenarde (1708), and Malplaquet (1709).