The ensuing campaign (A.D. 1707) found Louis XIV. "reduced on all sides to his own resources," and thoroughly wakened from his dream of foreign conquests – seeking only, and that with anxiety and alarm, to defend his own frontier. Here, however, two new actors appear on the chequered scene – the Duke of Marlborough's nephew, the Duke of Berwick, who by his great victory of Almanza counteracted in Spain his uncle's efforts – and Charles XII. of Sweden, a "new and formidable actor on the theatre of affairs in Germany." Louis XIV. made desperate efforts to win over Charles XII., but the exquisite adroitness of Marlborough frustrated them altogether. But Louis, encouraged by the gleams of success which had been visible in Spain and elsewhere, made immense efforts to recover his lost ground. Marlborough's energies were equally divided between delicate and perilous negotiations with the various European potentates, and another decisive campaign in the field. Both he and Louis made prodigious exertions, and at length were on the point of fighting another great battle; "and, by a most extraordinary coincidence, the two armies were of the same strength, and occupied the same ground, as did those of Napoleon and Wellington a hundred and eight years afterwards!" Marlborough was eager for the fight, confident of a great victory; but, at the eleventh hour, a panic seized his old friends the Dutch deputies, and they compelled him to retire to his former position, and decline the encounter, to his unspeakable mortification. The enemy, showing no disposition to encounter him, at length retreated, Marlborough advancing, but finding it impossible to bring on a general action. Both armies were led into winter-quarters, and Marlborough repaired to England, "where his presence had become indispensably necessary for arresting the progress of public discontent, fanned as it was by court and parliamentary intrigues, and threatening to prove immediately fatal to his own influence and ascendency, as well as to the best interests of England."29 Here we are plunged into the vortex of political intrigues, – the principal actors being Harley and St John and Mrs Masham on the one side, and on the other the Duke and Duchess of Marlborough, whose ascendency over the Queen and the country, and even their own party the Whigs, is evidently beginning to give way, and rapidly. Mr Alison here shows his dispassionate character to great advantage, holding the balance evenly between all parties. His candid and luminous statement is equally interesting and instructive; and one thing he brings out in a very striking manner, though not in so many words: we mean the retributive justice with which the duke's treachery to James II. was brought home to himself, and also to the duchess – the latter being utterly incredulous of the ingratitude and treachery of Mrs Masham towards her, and the former equally so in the case of Harley and St John. How often and how bitterly may such reflections have occurred to the duke and duchess! Their position at court had become exceedingly trying; but their treatment of the Queen was highly imprudent, the Duke being doubtless greatly influenced by his imperious and intractable duchess. Mr Alison regards her as the "faithful representative of the whole Whig party," whose "arrogant domination and grasping disposition were the real causes of their fall from power, and the total change in the foreign policy of England – results not attributable exclusively to female partiality, or a bed-chamber intrigue, which were, nevertheless, the ultimate agents in the change, and apparently its immediate precursors. The Whigs were haunted as incessantly by dread of a reaction as the Jacobins of France of a counter-revolution, and apprehended from a change of ministry not merely the usual subversion of their party, but serious personal consequences, in respect of the part which had been played to James II." Such is the general conclusion arrived at by Mr Alison – indicative, undoubtedly, of his candour and moderation. Early in 1708, and while Marlborough was placed in these critical circumstances, occurred the attempt of Louis XIV. to imitate, in some respect, the example of his Allied opponents, by invading Great Britain, in order to place the Pretender on the throne. Louis's terrible antagonist, however, Marlborough, was here again to confront him. As commander-in-chief, the Duke crushed the attempt, and the ambitious Chevalier was forced to creep back to Dunkirk ridiculously – the result serving only suddenly to reinstate Marlborough at the summit of popularity, and to silence all slanderous imputations upon his fidelity to the cause of the Revolution.
The precarious position of political matters in England, at this crisis, was profoundly appreciated by Marlborough, who said that any considerable reverse on the Continent, or even a campaign as nugatory as the last, would, probably, not only dissolve the Grand Alliance, and undo all that had been done, but place a new administration in power, and possibly seat another dynasty on the throne. He also surveyed, with unerring sagacity and accuracy, the whole position of Louis XIV., and saw that he was preparing for yet one more grand demonstration of force. Marlborough took his plans accordingly; and on the 12th April 1708, in concert with the incomparable Eugene, arranged the plan of operations. Marlborough resolved to use the precious opportunity yet available, before the accession of the Tory ministry, for the purpose of striking a tremendous blow. And he did what he purposed; for this campaign was signalised by most resplendent results, glorious to Marlborough almost beyond parallel, and equally disastrous to Louis XIV. Bring what forces the latter might into the field – array them under what consummate generals he pleased, and let him select his site, and mature his plan of operations as he chose – all was, as usual, in vain! Vendôme was here the directing military genius of Louis; and he succeeded in surprising Ghent and Bruges into a surrender, greatly to the vexation of Marlborough. But the latter instantly resolved on a scheme as masterly as it proved successful. He resolved to throw himself on his opponent's communication, and, by interposing between him and the French frontier, compel him to fight with his face towards Paris, and his back to Antwerp. This manœuvre was executed with a rapidity commensurate with its importance – and Vendôme's skilful plans were entirely disconcerted. He moved of precipitately, followed by Marlborough, who resolved to force him to a decisive action; and succeeded – adding Oudenarde to his other laurels. This was indeed a fearful affair. Both parties fought with desperation – Vendôme with eighty-five thousand men, Marlborough with eighty thousand. Nothing could resist his generalship and valour; and Vendôme was defeated, with a loss, including deserters, of fully twenty thousand men. "If I had had two hours more of daylight," said Marlborough, "the French army would have been irretrievably routed, great part of it killed or taken, and the war terminated on that day." The results of this sanguinary but glorious battle were immense, entirely altering the character and fate of the campaign. By his admirable movement in interposing between Vendôme and France, Marlborough had gained the incalculable advantage of throwing his opponent, in the event of defeat, into a corner of Flanders, and so leaving exposed the French frontier, and all its great fortresses. Marlborough's eagle eye, perceiving the capabilities of his new position, resolved to discard all minor objects, pass the whole fortified towns