Italy entered the war before France agreed to the armistice and attacked across the Alpine frontier in search of a share of the victory. The advance was unsuccessful and did not make a decisive contribution to France's defeat. The Maginot Line defenses in that sector performed their intended role against the Italian attack. French governmental collapse ended the campaign before that battlefield resistance could matter more, making the Alpine front relevant to the branch in which France keeps fighting.
Notable Point · 1:18:24-1:19:08
Italy's unsuccessful 1940 invasion of France
The real Italian attack in the Alps provides context for why continued French resistance would leave Italy facing a difficult western front.