His indecisive campaign of 1703.

The next year he prepared to push his success further. Instructing the Dutch to advance on the right wing into Flanders, capture Antwerp, and seize the line of the Scheldt, he with the left wing pushed down the Rhine, overran the electorate of Köln, and in May 1703 made himself master of Bonn. He was now secure of his communications with north Germany, and was preparing to organise a German army to operate upon the Moselle, and keep up communications between himself and the Emperor, when he was recalled to the Netherlands in hot haste to assist the Dutch. Tired of waiting for the siege train and transport necessary to form the siege of Antwerp, the Dutch had begun to send out detachments into Flanders for pure plundering purposes. One of these under Opdam was suddenly attacked by Boufflers, and completely destroyed in June 1703. Whereupon the Dutch, in the extremity of terror, absolutely refused to undertake the siege of Antwerp at all. On Marlborough’s arrival Boufflers withdrew behind the lines of the Mehaigne, which he had carefully fortified by ramparts and towers. Marlborough, sure of his ability to force the lines, made preparations for the attack, but the Dutch declined to co-operate, and the English general, baffled and dispirited, was obliged to content himself with the capture of a few inferior fortresses.

Advance of the French upon Vienna, 1703.

Meanwhile on the upper Rhine things were going badly for the allies. Louis had always intended to make his main attack in this quarter. His plan included a simultaneous advance upon Vienna by the Danube and by Italy, with the help of the duke of Savoy and the elector of Bavaria, while Boufflers in the Netherlands merely kept the English and the Dutch army occupied and entangled amid fortresses and fortifications. The success of prince Eugene in Italy, and his own want of preparation delayed for some time the commencement of this movement, but by the beginning of the year 1703 all was ready. Vendôme was facing prince Eugene upon the Adige ready to attack. The elector of Bavaria had definitely declared himself on the French side and captured Ulm. Accordingly in February 1703 Villars crossed the Rhine at Strasburg, took Kehl by storm, forced the passes of the Black Forest, and joined the elector on the Danube; while Tallard at the head of another army on the Rhine supported his movements, and protected his communications with France. Prince Louis of Baden, and count Stirum, who commanded the allied forces, unable to make head against the enemy, withdrew into the lines of Stolhofen, a little below Kehl, which they had carefully fortified in order to form a base of operations for the imperial armies on the upper Rhine, and there kept Tallard at bay. The Emperor was in terrible straits. The Hungarians had risen under Ragotsky, and were preparing to attack Vienna from the east. Vendôme was pushing prince Eugene slowly before him over the Brenner pass to Innsbruck. The only other Austrian force was cooped up behind Stolhofen. There was not a man between the elector and Vienna, and Villars strongly urged Max Emanuel to march at once with all his forces on Vienna, and end the war at a blow, while he posted himself on the Danube at Donauwörth, and defended Bavaria from a flank attack.

Savoy joins the Grand Alliance, 1703.

Unfortunately for himself and his ally the elector had not the required energy. The opportunity passed never to return. Max Emanuel determined to crush prince Eugene first. In June he was at Kufstein on his way to Innsbruck, while Vendôme had penetrated up the pass as far as Trent. The army of Eugene was entangled in the mountains between them. He owed his preservation to fortune, not to skill. Just at this moment Victor Amadeus of Savoy, after hesitating some months, made up his mind that the winning side would be that of the allies. He joined the Grand Alliance, and Vendôme had to hasten back to Piedmont to preserve his communications. The elector hearing of the retreat of Vendôme, dared not face Eugene by himself in such a country, and began to retire. The Tirolese at once rose on behalf of their much-loved master, and Max Emanuel had to fight his way back to Bavaria as best he could. He found Villars defending himself with difficulty against prince Louis of Baden and Stirum. On the arrival of the elector before Augsburg, prince Louis left Stirum and marched to Augsburg, hoping to raise the siege, but Villars was too quick for him. Falling upon Stirum he defeated him completely at Höchstadt on the 20th of September, and drove him back on Nuremberg. Prince Louis had at once to retire to the lines of Stolhofen, and Augsburg fell into the hands of the elector.

Dangerous position of the Emperor, 1704.

For the moment the Emperor was safe. The year was too far advanced to permit of a combined movement upon Vienna. But it was clear to all parties that the attempt would be made in the next campaign. It seemed equally certain that if made it must succeed, unless Marlborough and the army of the Netherlands could come to the rescue. Louis made great preparations for the effort. Villars, whose arrogance was displeasing to the elector, was recalled and sent to the Cevennes, where the remnants of the Huguenots had risen under the name of the Camisards. His place was taken by Marsin, and his army strongly reinforced. The plan of campaign was simple. Marsin and the elector were to march straight upon Vienna down the Danube, while Ragotsky attacked the city from the side of Hungary. Tallard, at the head of 35,000 men, was posted in Alsace to support the movement, preserve the communications, and defend the army from any flank attack. Villeroy, with 30,000 men, was sent to the Netherlands to keep Marlborough at bay and prevent him from coming to the rescue. Against this overwhelming force Austria could only oppose the armies of prince Louis of Baden, and prince Eugene. If the Emperor was to be saved, it must be by Marlborough, and how could Marlborough leave the Netherlands without throwing open the United Provinces to invasion? Was it likely that the Dutch would endanger their own safety for the sake of the Emperor? Even if they did, was it possible to escape the combined attack of the armies of Tallard and Marsin and the elector when the Danube was reached?

Plan of Marlborough.

These were the questions to which Marlborough was preparing to give an answer in the summer of 1704. He had conceived the brilliant plan of moving the whole of his army, except the Dutch, from the field of operations in the Netherlands to a totally new base upon the upper Danube, and of crushing Marsin and the elector before Tallard could come to their help from the Rhine, or Villeroy overtake him from the Meuse. It was a scheme which was certain to fail except in the hands of a consummate general, for it involved not merely a victory over equal and possibly superior forces, but a long and extremely hazardous flank march over difficult country, and a race against time. And that was not all, for before he could even undertake it, he had to deceive the Dutch and lull Villeroy into a false security. If the Dutch once suspected that he was going to move his army away from the protection of their frontier, they would impose an energetic and decided veto. If Villeroy once divined that Marlborough was engaged in making a long march up the Rhine, he could ruin the whole plan in a moment by a well-directed flank attack. To surmount these difficulties, Marlborough, keeping his real plan an absolute secret, let it be generally known that he intended to try and turn the lines and fortresses of the Netherlands, by advancing into France by way of the Moselle, and he publicly asked for, and obtained, the permission of the Dutch to that scheme. This enabled him to summon the Brandenburg contingent to the Rhine at Mainz, and to move his own headquarters to Coblentz without incurring suspicion, and to leave Overkirk with the Dutch army and the Dutch deputies at Maestricht on his extreme right, to guard the line of the Meuse should Villeroy advance on Amsterdam during his absence. The plan succeeded admirably. Villeroy, completely deceived, took up a strong position on the upper Moselle near Trier to resist the advance of the allies, and waited in vain for the first signs of the invading army. His flank march to the Danube. The Dutch left behind at Maestricht could not interfere with Marlborough’s plans. All was ready.[8] In June 1704 he threw off the mask, advanced up the Rhine by forced marches to Mainz, then, picking up the Brandenburg contingent as he went, he left the Rhine and directed his army straight upon the upper Danube at Donauwörth. At Heilbronn he was joined by a German force, and near Ulm by prince Eugene and prince Louis of Baden. It was agreed that Eugene should return to Stolhofen to prevent Tallard, and possibly Villeroy if he appeared upon the scene, from coming to the assistance of the elector and Marsin before the allies could attack them. Marlborough himself and prince Louis of Baden marched straight against the elector, who had entrenched himself on the Schellenberg near Donauwörth, carried the lines by assault on the 2d of July and drove the elector back on Augsburg, thus thrusting themselves in between the French and Vienna and completely protecting the latter city.