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How long did Hannibal’s journey from Cartagena to Italy take?

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Illustration of Hannibal the Carthaginian general wearing a metal helmet and armor, holding a shield decorated with a horse. — Hannibal Hannibal, engraving by John Chapman, 1800.

Hannibal’s journey from Cartagena to Italy took five months. During this expedition, he marched approximately 750 miles (1,210 km) through Spain and Gaul before crossing the Alps to reach the Italian plains in the autumn of 218 BCE.123