What Diseases Did Napoleon’s Soldiers Really Face in 1812
328In 1812, Napoleon Bonaparte’s army marched into Moscow, only to face disaster. Out of around 615,000 soldiers, just about 110,000 made it home. Many died not just in battle, but from the brutal Russian winter, starvation, and disease. Historians have long debated which illnesses hit Napoleon’s troops hardest. Now, new DNA analysis of soldiers’ remains sheds light on what diseases were likely involved.
Uncovering Hidden Pathogens from the Past
Scientists used advanced DNA technology to examine bones and teeth of soldiers who died in Vilnius, a key site during Napoleon’s retreat. They focused on 13 teeth from different individuals. The goal was to find traces of bacteria or viruses that might explain the widespread suffering. This approach is a big step forward because old samples usually contain tiny, broken pieces of microbial DNA that are hard to interpret.
What the DNA Revealed About 19th-Century Diseases
The analysis found evidence of two main pathogens. One is Salmonella enterica, which causes paratyphoid fever, a nasty illness with symptoms like diarrhea and fever. The other is Borrelia recurrentis, transmitted by body lice and responsible for relapsing fever, which causes repeated bouts of high fever and chills. Interestingly, they did not find signs of typhus bacteria, despite it being a common disease among armies at that time.
Some earlier studies looked for other infections. For example, a 2006 DNA analysis of remains from Vilnius suggested the presence of typhus bacteria and trench fever pathogens. But those tests used older methods that are less precise. The new research used modern techniques, which are more reliable, and found no evidence of the typhus bacteria in this set of samples.
What This Tells Us About Napoleon’s Army
The soldiers’ symptoms, recorded in historical reports, included dysentery, fevers, jaundice, and diarrhea—signs consistent with the infections now identified. An 1812 report mentioned soldiers suffering from typhus, dysentery, and diarrhea after eating salted beets, which likely upset their stomachs. Such symptoms can match many diseases, making it hard to tell exactly what killed them just from descriptions.
Because only 13 teeth were tested, scientists caution that their findings are suggestive, not conclusive. They cannot rule out the presence of other diseases like typhus or trench fever in the broader army. Still, the evidence points to a combination of exhaustion, cold, and infectious diseases like paratyphoid and relapsing fever weakening the soldiers even further.
This research helps us understand how disease contributed to historic military failures. It also shows how modern science can uncover the tiny clues left behind in old remains. Even today, figuring out what made past armies suffer can help us better control infectious diseases now and in the future.
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