Reconstructing Hannibal’s Alpine Crossing
Researchers from the University of Oxford, the German Centre for Integrative Biodiversity Research, and the University of Jena have calculated the energy demands of various potential paths used by Hannibal during his historic crossing of the Alps. Their modeling indicates that the Col de la Traversette pass was both the shortest and most energy-efficient route.
Hannibal, the famed Carthaginian general, hailed from Carthage—located in what is now Tunisia. His military campaign unfolded during the Second Punic War, with an army estimated at roughly 40,000 men, 7,000 horses, and 37 war elephants. Two primary historical accounts of the crossing survive, written by Polybius and Livy, composed 20 and 160 years after the event, respectively. According to Livy, Hannibal completed the Alpine crossing in 16 days, with the entire campaign lasting about two months. However, the journey cost him over 20,000 soldiers, and Carthage ultimately lost the war.
Route Analysis
The study, which identified the Traversette path as the most efficient, also compared it to other passes. For instance, traveling via the Col de Montgenèvre would have required 11% more energy than the Traversette route, while the Col du Clapier would have demanded 16% more, and the Col du Mont Cenis 19% more. According to the models, on the Traversette route, men would have lost 19% of their body fat reserves, whereas the elephants would have lost only 4%.
Dr. Emilio Berti, co-author of the study and a biologist at the German Centre for Integrative Biodiversity Research and Friedrich Schiller University Jena, noted: 'The exact route taken by Hannibal has been debated for generations. The new analysis doesn't eliminate all uncertainty, but it strengthens the case for the Traversette route by showing it better meets the needs of moving a large army, including elephants, through the extremely challenging Alpine terrain.'
These findings add a fresh dimension to the history of military campaigns, highlighting the critical role of energy expenditure in planning large-scale movements. Examining the routes used in antiquity can deepen our understanding not only of wartime strategies but also of how armies adapted to natural environments. This research may serve as a foundation for further scientific work in military history and bioengineering.