Accordingly, he still clung to his lines, contenting himself with sending a cavalry regiment to observe Bernadotte's movements; but neither he nor his nominal chief, the Archduke Ferdinand, divined the truth. Indeed, so far did they rely on the aid of the Russians as to order back some regiments sent from Italy by the more sagacious Archduke Charles; but 11,000 troops from Tyrol reached the Swabian army. That force was now spread out so as to hold the bridges of the Danube between Ingolstadt and Ulm; and on October 7th the Austrians were disposed as follows: 18,000 men under Kienmayer were guarding Ingolstadt, Neuburg, Donauwörth, Günzburg, and lesser points, while Mack had about 35,000 men at Ulm and along the line of the Iller; the arrival of other detachments brought the Austrian total to upwards of 70,000 men. Against this long scattered line [pg.20] Napoleon led greatly superior forces. [[27]] The development of his plans proceeded apace. Though Prussia had proclaimed her strict neutrality, he did not scruple to violate it by sending Bernadotte's corps through her principality of Ansbach, which lay in their path. He charged Bernadotte to "offer many assurances favourable to Prussia, and testify all possible affection and respect for her—and then rapidly cross her land, asserting the impossibility of doing anything else." Accordingly, that Marshal was lavish in his regrets and apologies, but ordered his columns to defile past the battalions and squadrons of Prussia, that were powerless to resent the outrage. [[28]]
The news of this trespass on Prussian territory reached the ears of Frederick William at a critical time, when the Czar sent to Berlin a kind of ultimatum, intimating that, even if Prussia deserted the cause of European independence, Russian troops must nevertheless pass through part of Prussian Poland. Stung by this note from his usually passive demeanour, the King sent off an answer that such a step would entail a Franco-Prussian alliance against the violators of his territory, when the news came that Napoleon had actually done at Ansbach what Alexander had announced his intention of doing in the east. The revulsion of feeling was violent: for a short space the King declared he would dismiss Duroc and make war on Napoleon for this insult, but in the end he called a cabinet council and invited the Czar to come to Berlin. [[29]]
While the Gallophil counsellors, Haugwitz and [pg.21] Lombard, were using all their arts to hinder the Prusso-Russian understanding, the meshes were being woven fast around Mack and the Archduke Ferdinand. Bernadotte's corps, after making history in its march, was detached to the south-east so as to hold in check the Russian vanguard, and to give plenty of room to the troops that were to cut off Mack from Austria, a move which may be compared with the march of Bonaparte to Milan before he essayed the capture of Melas. Both steps bespeak his desire to have ample space at his back before circling round his prey.
On October 6th the corps of Soult and Lannes, helped by Murat's powerful cavalry, cut the Austrian lines on the Danube at Donauwörth, and gained a firm footing on the right bank. Over the crossing thus secured far in Mack's rear, the French poured in dense array, and marched south and south-west towards the back of the Austrian positions, while Ney's corps marched to seize the chief bridges over the Danube.
A study of the processes of Mack's brain at this time is not without interest. It shows the danger of intrusting the fate of an army to a man who cannot weigh evidence. Mack was not ignorant of the course of events, though his news generally came late. The mischief was that his brain warped the news. On October 6th he wrote to Vienna that the enemy seemed about to aim a blow at his communications: on October 7th, when he heard of the loss of Donauwörth, he described it as an unfortunate event, which no one thought to be possible. The Archduke now urged the need of an immediate retreat towards Munich, and marched in an easterly direction on Günzburg: another Austrian division of 8,000 men moved on Wertingen, where, on October 8th, it was furiously attacked by the troops of Murat and Lannes. At first the Imperialists firmly kept their ranks; but the unequal contest closed with a hasty flight, which left 2,000 men in the hands of the French Then Murat, pressing on through the woods, cut off Mack's retreat to Augsburg. Yet that general still took [pg.22] a cheerful view of his position. On that same day he wrote from Günzburg that, as soon as the enemy had passed over the Lech, he would cross the Danube and cut their communications at Nördlingen. He wrote thus when Ney's corps was striving to seize the Danube bridges below Ulm. If Mack were to march north-east against the French communications it was of the utmost importance for him to hold the chief of these bridges: but Ney speedily seized three of them, and on the 9th was able to draw closer the toils around Ulm.
From his position at Augsburg the French Emperor now directed the final operations; and, as before Marengo, he gave most heed to that side by which he judged his enemy would strive to break through, in this case towards Kempten and Tyrol. This would doubtless have been Mack's safest course; for he was strong enough to brush aside Soult, gain Tyrol, seal up its valleys against Napoleon, and carry reinforcements to the Archduke Charles. But he was still intent on his Nördlingen scheme, even after the loss of the Danube bridges exposed his march thither to flank attacks from the four French corps now south of the river. Nevertheless, Napoleon's miscalculation of Mack's plans, or, as Thiers has striven to prove, a misunderstanding of his orders by Murat, gave the Austrians a chance such as fortune rarely bestows. [[30]]
In spite of Ney's protests, one of his divisions, that led by Dupont, had been left alone to guard the northern bank of the Danube, a position where it might have been overwhelmed by an enterprising foe. What is more extraordinary, Dupont, with only 6,000 men, was charged to advance on Ulm, and carry it by storm. On the 11th he accordingly advanced against Mack's fortified camp north of that city. The Austrians met him in force, and, despite the utmost heroism of his troops, finally wrested the village of Hasslach from his grasp; later in the day a cloud of their horsemen, swooping [pg.23] round his right wing, cut up his tired troops, took 1,000 prisoners, and left 1,500 dead and wounded on the field. Among the booty was found a despatch of Napoleon ordering Dupont to carry Ulm by storm—which might have shown them that the French Emperor believed that city to be all but deserted. [[31]] In truth, Napoleon's miscalculation opened for Mack a path of safety; and had he at once marched away to the north, the whole aspect of affairs might have changed. The Russian vanguard was on the banks of the Inn: all the French, except the relics of Dupont's division, were south of the Danube, and a few vigorous blows at their communications might have greatly embarrassed troops that had little artillery, light stores of ammunition, and lived almost entirely on the produce of the country. We may picture to ourselves the fierce blows that, in such a case, Frederick the Great would have rained on his assailants as he wheeled round on their rear and turned their turning movements. With Frederick matched against Napoleon, the Lech and the Danube would have witnessed a very cyclone of war.
But Mack was not Frederick: and he had to do with a foe who speedily made good an error. On October 13th, when Mack seemed about to cut off the French from the Main, he received news through Napoleon's spies that the English had effected a landing at Boulogne, and a revolution had broken out in France. The tidings found easy entrance into a brain that had a strange bias towards pleasing falsities and rejected disagreeable facts. At once he leaped to the conclusion that the moves of Soult, Murat, Lannes, Marmont, and Ney round his rear were merely desperate efforts to cut back a way to Alsace. He therefore held fast to his lines, made only feeble efforts to clear the northern road, and despatched reinforcements to Memmingen. The next day brought other news; that Memmingen had been invested by [pg.24] Soult; that Ney by a brilliant dash across the Danube at Elchingen had routed an Austrian division there, and was threatening Ulm from the north-east; and that the other French columns were advancing from the south-east. Yet Mack, still viewing these facts in the twilight of his own fancies, pictured them as the efforts of despair, not as the drawing in of the hunter's toils.
He was now almost alone in his reading of events. The Archduke Ferdinand, though nominally in supreme command, had hitherto deferred to Mack's age and experience, as the Emperor Francis enjoined. But he now urged the need of instantly marching away to the north with all available forces. Still Mack clung to his notion that it was the French who were in sore straits; and he forbade the evacuation of Ulm; whereupon the Archduke, with Schwarzenberg, Kollowrath, Gyulai, and all whose instincts or rank prompted and enabled them to defy the madman's authority, assembled 1,500 horsemen and rode off by the northern road. It was high time; for Ney, firmly established at Elchingen, was pushing on his vanguard towards the doomed city: Murat and Lannes were charged to support him on the north bank, while across the river Marmont, and further south Soult, cut off the retreat on Tyrol.
At last the scales fell from Mack's eyes. Even now he protested against the mere mention of surrender. But again he was disappointed. Ney stormed the Michaelsberg north of Ulm, a position on which the Austrians had counted; and on October 17th the hapless commander agreed to terms of capitulation, whereby his troops were to march out and lay down their arms in six days' time, if an Austro-Russian army able to raise the siege did not come on the scene. These conditions were afterwards altered by the captor, who, wheedling his captive with a few bland words, persuaded him to surrender on the 20th on condition that Ney and his corps remained before Ulm until the 25th. This was Mack's last offence against his country and his profession; his assent to this wily compromise at once [pg.25] set free the other French corps for offensive operations; and that too when every day was precious to Austria, Russia, and Prussia.