Boyen describes the surprising effects of the fire of the British rocket battery that served in Bernadotte's army. Captain Bogue brought it forward to check the charge of a French column against the Swedes. He was shot down, but Lieutenant Strangways poured in so hot a fire that the column was "blown asunder like an ant-heap," the men rushing back to cover amidst the loud laughter of the allies.
The premature explosion was of course due, not to Napoleon, but to the flurry of a serjeant and the skilful flanking move of Sacken's light troops, for which see Cathcart and Marmont. The losses at Leipzig were rendered heavier by Napoleon's humane refusal to set fire to the suburbs so as to keep off the allies. He rightly said he could have saved many thousand French had he done so. This is true. But it is strange that he had given no order for the construction of other bridges. Pelet and Fain affirm that he gave a verbal order; but, as Marbot explains, Berthier, the Chief of the Staff, had adopted the pedantic custom of never acting on anything less than a written order, which was not given. The neglect to secure means for retreat is all the stranger as the final miseries at the Beresina were largely due to official blundering of the same kind. Wellington's criticism on Napoleon's tactics at Leipzig is severe (despatch of January 10th, 1814): "If Bonaparte had not placed himself in a position that every other officer would have avoided, and remained in it longer than was consistent with any ideas of prudence, he would have retired in such a state that the allies could not have ventured to approach the Rhine."
Sir Charles Stewart wrote (March 22nd, 1814): "On the Elbe Napoleon was quite insane, and his lengthened stay there was the cause of the Battle of Leipzig and all his subsequent misfortunes" ("Castlereagh Papers," vol. ix., p. 373).
Napier, vol. v., pp. 368-378.