In the winter of 1812, Napoleon’s Grande Armée faced its most devastating enemy, not the Russian army, but biology itself.
Starvation, exhaustion, and freezing temperatures ravaged the troops, while invisible microbial forces finished what warfare began.
Through ancient DNA analysis, scientists uncovered the true pathogens behind the empire’s collapse, revealing that Napoleon’s defeat was as much a biological catastrophe as a military one.
In June 1812, Napoleon invaded Russia with his Grande Armée of about 680,000 men.
After a bloody but indecisive victory at Borodino, Napoleon entered a burning Moscow in September, only to find it abandoned and set aflame on orders from its governor.
With winter closing in and Alexander refusing peace, Napoleon was forced to withdraw in October.
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Author's summary: Napoleon's defeat was a biological catastrophe.