Alexander, Barclay and Diebitsch were acutely aware of this danger. The moment he arrived on the battlefield and could see the two armies’ deployment amidst the October gloom, Alexander sent orders for the Guards to advance at speed from Rötha. From the time they received their orders it would take them three hours to reach the battlefield. Nikolai Raevsky’s Grenadier Corps was closer but his two divisions on their own would never suffice to shore up the whole allied line. Meanwhile, even after they had been released by Schwarzenberg shortly before midday, the Austrian reserves had to march south down the west bank of the Pleisse to the fords near Crobern, get themselves across the swollen river, and then turn northwards to come to the aid of Kleist’s corps at Markkleeberg. For the Austrian infantry, this was a four-hour march. It was very fortunate that Alexander’s insistence on bringing his Guards over to the east bank of the Pleisse meant that at this moment of supreme crisis they would not be competing with the Austrians for river crossings.28
Also luckily for the allies, Napoleon took longer than he had anticipated to organize and launch his counter-attack. He was waiting for Marmont but the latter was forced to stop while on the march southwards and race back to block Blücher at Möckern. Above all, Napoleon would not move until Marshal MacDonald’s whole corps had come up on his left and had advanced against the Austrians towards Seifertshain. Only when MacDonald’s threat in the east had developed would the emperor throw in his main forces against Kleist and Eugen. It was almost midday before MacDonald was in position and ready to attack. Though he then drove back Klenau’s Austrians all the way to Seifertshain, at this point Austrian resistance stiffened and MacDonald’s attack stalled. The sudden arrival to his east of thousands of Cossacks commanded by Matvei Platov distracted MacDonald’s attention and also contributed to slowing his advance. Platov drew off Sebastiani’s cavalry corps which was operating on MacDonald’s eastern flank and without Sebastiani MacDonald lacked the means to outflank Klenau or the numbers to smash through the Austrian position at Seifertshain.
By the early afternoon Napoleon’s attention had shifted westwards, towards Kleist’s and Eugen’s shrinking battalions. Against them he launched his Guards, most of his cavalry, Drouot’s artillery reserve, and all the remaining infantry at his disposal.
By 3 p.m. Kleist’s brigades were fighting desperately to hold Markkleeberg and had been forced out of Auenhain, with French cavalry in pursuit. The 2nd Russian Grenadier Division came up behind Auenhain but could not stop the French advance. Fortunately for the allies, the six excellent regiments of Count Nostitz’s cuirassier corps arrived in the nick of time, scattered the French cavalry and restored the situation. Nostitz’s regiments were the first of the Austrian reserves to arrive from the west bank of the Pleisse but they were followed by more cavalry and then by Bianchi and Weissenwolf’s infantry divisions. Count Weissenwolf’s Grenadier battalions were among the best infantry in the Austrian army. Once they were on the scene Napoleon’s chance of breaking through Kleist’s position had disappeared. On the contrary, by the time evening approached and the battle ceased Weissenwolf’s Grenadiers had recaptured Auenhain and it was Napoleon who was having to commit even part of his Old Guard to stop the Austrians advancing from Markkleeberg.29
While Kleist’s Prussians and Russians were fighting for their lives at Markkleeberg and Auenhain during the afternoon of 16 October an even fiercer battle was raging to their right around the village of Gossa. This was the centre of the allied line east of the river Pleisse and behind Gossa the allied monarchs and their staffs were positioned on a small hill. The infantry leading the French advance came from Lauriston’s Fifth Corps and Marshal Oudinot’s Young Guard. Down the hill in their support came much of the French artillery reserve, including all the Guards artillery, commanded by General Drouot, who had good claim to be the finest artillery commander in Europe.