‘That may be so.’ Napoleon nodded. ‘But what they lack in brains they seem to make up for with courage.’

They stared fixedly as the Russians came on, hurling themselves up the slope, mouths agape as they shouted their war cries. The standards jostled above the thick shivering sea of bayonets, broken here and there by a sword as the officers urged their men on. Any pretence of formation was soon lost and it seemed to Napoleon as if the French were about to be engulfed by a raging mob.

‘Ready muskets!’ Vandamme bellowed out and the order was repeated along the front line as the men brought their weapons up and levelled them at the face of the oncoming enemy. When the foremost Russians were little more than fifty paces from the tips of the French bayonets,Vandamme bellowed, ‘Fire!’

A ragged volley crashed out along the front line and the enemy was instantly obscured by a billowing veil of powder smoke. A light wind was blowing over the Heights and the smoke quickly dispersed enough to reveal that scores of the Russians had been struck down, but already their comrades were leaping over them, bayonets levelled as they raced towards the French.Vandamme’s men hurriedly grounded their muskets and drew fresh cartridges from their pouches, biting the ends off and pouring the powder into their muzzles, before spitting the balls in and ramming the charges home.There was just enough time to fire a second desperate volley before the charge reached them. Once again smoke filled the air, but before it could disperse the Russians charged through and ran full pelt in amongst the French. Within seconds the front line had turned into a chaotic tangle of blue and green uniforms as the Russians fought like ferocious beasts. There was no attempt at bayonet drill, just violent thrusts of the blade and bone-crunching thuds as the butts of their weapons were used like clubs.

The first line of Vandamme’s division reeled under the impact and for a moment it held, before the first of the Russians burst through and the line quickly dissolved into a general melee.

‘Your men are going to break,’ Napoleon said quietly.

Vandamme was silent for a moment before he conceded, ‘I fear so, sire.’

‘Then you must hold them with the second line. Understand?’

‘Yes, sire.’

Napoleon turned to one of his escort.‘Get back to headquarters.Tell Berthier I want the Guard cavalry sent to support Vandamme at once.’