This post follows on from this one on Napoleon’s campaign in Russia up to Battle of Vitebsk on 28 July 1812.
The Russian commander, General Michael Barclay de Tolly, was reluctant to attack. The further that the French advanced into Russia, the better the odds became for the Russians. The French were being harassed by Cossacks and had to leave troops to guard their lines of supply, whilst the Russian were able to bring up more troops.
However, most Russians could not understand why they were surrendering so much territory without a fight, especially after Barclay was joined by General Peter Bagration’s Second Army on 4 August. According to David Chandler, Barclay commanded 125,000 men and Napoleon had about 185,000 in the immediate area.
Barclay was under pressure both from both Tsar Alexander and from his subordinates to attack. On 6 August his generals persuaded him to concentrate against Marshal Joachim Murat’s cavalry and Marshal Michel Ney’s corps. The next day, Barclay received false reports that there was a French force at Poriechie to his north. He re-aligned his army to the north to face the supposed French threat.
General Matviei Platov, commanding the Don Cossacks. did not receive the order to move north. He encountered and defeated General Horace Sebastiani’s cavalry division at the Battle of Inkovo, taking 200 prisoners, but had to retreat when the French counter-attacked.
Barclay ordered a cautious advance on 13 August, but Bagration, angered by Barclay’s continual changes of orders, declined to co-operate. He had put himself under Barclay’s command when they united on 4 August, but he was not officially subordinate to Bagration.
Napoleon had halted his advance on Smolensk and prepared to receive a Russian attack when he learnt of Inkovo. By 10 August it was apparent that this was not going to happen and he resumed preparations for an attempt to envelop the Russians at Smolensk. Chandler says that:
Almost all commentators agree that this operational plan constitutes one of Napoleon’s masterpieces…This was a manoeuvre of strategic envelopment worthy of the one that preceded his great triumph of Jena-Auerstadt in 1806, and if it had succeeded the fruits of victory would have been no less impressive.
The French manoeuvres started on 11 August. Barclay put a rearguard of 8,000 infantry and 1,500 cavalry under General Neveroski on the south bank of the Dnieper to guard the approaches to Smolensk. It held up the French cavalry, which might otherwise have reached Smolensk on 14 August. Instead, Napoleon paused for a day to re-group.
Napoleon had now lost the element of surprise and the Russians were able to withdraw to Smolensk. Barclay ordered General Raevski to occupy it with 20,000 men and 72 guns. It had a medieval wall and some more modern defences, but these were in a poor state of repair.
The French reached Smolensk on 16 August. Some fighting took place, but they did not attempt to storm the city until the next day. The Russians held on, suffering 12-14,000 casualties, but inflicting 10,000. Chandler says that it is unclear why Napoleon attacked rather than masking the city and moving to threaten the Smolensk to Moscow road.
Barclay feared such a manoeuvre and evacuated Smolensk on the night of 17-18 August after destroying all his stores. Grand Duke Constantine, the Tsar’s brother, and General Bennigsen objected to this and accused Barclay of cowardice.
The French were slow to move, and their pursuit did not get properly underway until 19 August. General Junot was ordered to take his corps over the Dnieper at Prudichevo in order to cut off the Russian retreat, but took all day to find a crossing, and then did not attack. Ney and Murat were held up by the Russian rearguard under Eugen and Tutchkov at Valutino, and the main Russian
Napoleon did have some good news on 18 August; a victory at Polotsk secured his northern flank. Marshal Charles Oudinot, the French commander, was wounded, but General Laurent St Cyr took over and defeated the Russians. St Cyr was promoted to Marshal.
However, Napoleon was having to advance even further into Russia in an attempt to bring the Russians to battle.
 D. Chandler, The Campaigns of Napoleon (London: Weidenfeld & Nicolson, 1966), p. 782.
 Ibid., pp. 783-84.
 Ibid., p. 786.