The thinking behind this move was that there was less urgency than previously feared because Wittgenstein and Bohemia were not in immediate danger. No doubt too the kindly commander-in-chief listened to the howls of his Austrian generals about the miserable condition of their men. Uncertain in his own mind whether it would be possible to take Dresden on 25 August, Schwarzenberg wavered between describing the planned attack as a
The Austrian official history claims that when the moment planned for the attack came in the afternoon of 25 August not only their own troops but also Kleist’s Prussians had not yet arrived. The decision was taken to postpone the attack until the next day. But on 26 August fierce arguments raged among the allied leaders as to whether an assault on Dresden was practicable. Frederick William III was committed to an attack and so, less fervently, was Schwarzenberg if and when sufficient troops had arrived. Alexander was always dubious and by the afternoon of 26 August was opposed to the idea. He drew on the advice of both Moreau and Toll, who thought that any attack would fail.
So too even by 25 August did Dresden’s commander, Saint-Cyr. At nine in the morning of 25 August he reported to Napoleon that allied columns were approaching the city and seemingly planned an assault: ‘This attack seems to me a bit belated, given Your Majesty’s approach.’ He added that since Murat had already shown himself in the front lines and the campfires of Napoleon’s corps must be visible to the allies they could not be under any illusion about the emperor’s imminent arrival. Whether Dresden could have been stormed on 26 August is doubtful. The city’s defences had been restored and improved by Napoleon during the armistice: as he himself had discovered in the previous year at Smolensk, even out-of-date walls and improvised fortifications could greatly slow down an attacking force. Moreover, by 26 August Napoleon’s reinforcements were already flowing into the city.56
Given the speed with which his own troops moved, it is perhaps not surprising that Schwarzenberg was baffled by Napoleon’s feat in marching his three corps the 120 kilometres from Löwenberg in Silesia to the Dresden area in just three days. Though this frustrated allied plans to take Dresden, to some extent it fulfilled the purpose of the Trachenberg plan. By advancing into Napoleon’s rear and threatening his key base at Dresden the Army of Bohemia had stopped him from pursuing and overwhelming Blücher. In retrospect, too, the allies could be thankful that Napoleon had satisfied himself with marching to the rescue of Dresden rather than carrying out his initial and much more daring plan to destroy Schwarzenberg’s army.