The Colle della Rho during antiquity was one of the most frequented connections between Susa Valley and Maurienne, and close to it some Roman coins have been found. From the middle ages on several battles and skirmish occurred on the pass, which was located at first on the border between Dauphiné and Savoy (up to the Peace of Utrecht, 1713) and later, from 1860 on, between France and Italy. The last fights near the col were connected to the italian invasion of France (June 1940).