modane was liberated on 13 september 1944, with no significant resistance from the maginot fortifications. german forces retreated up the mont cenis pass, and fighting ceased until the spring of 1945. on 23 march 1945, french forces bombarded the area and advanced to redoute-ruiné by 31 march. however, the fortification was not captured for another month. fighting took place around mont-froid through april, until german forces abandoned mont cenis on 25 april.