How many elephants did Hannibal bring across the Alps into Italy?

Hannibal brought most of his original 37 elephants across the Alps into Italy.1

While he began his journey with at least 37 elephants, the treacherous conditions of the mountain crossing, including snow and hazardous, narrow tracks, made the journey difficult for both men and animals. Despite these challenges, he successfully descended into Italy with the majority of that original force. Following his arrival, the subsequent winter and the rigors of early military campaigns, such as the Battle of the Trebbia River, took a further toll on the surviving elephants.213