Key Facts
- Duration
- 15 days (10–25 June 1940)
- Italian declaration of war
- 10 June 1940, effective just after midnight
- Most significant Italian conquest
- Menton, on the Italian border
- Armistice signed
- 24 June 1940, Rome
- Armistice oversight body
- CIAF, headquartered in Turin
Strategic Narrative Overview
Following the declaration of war, both sides initially maintained defensive postures along the Alpine front, with limited patrol skirmishing and artillery exchanges between the French Ligne Alpine forts and Italy's Vallo Alpino. After France announced it would seek an armistice with Germany on 17 June, Italy launched a general offensive on 21 June. The main thrust came in the northern Alpine sector, with a secondary coastal advance. Italian forces penetrated only a few kilometres into French territory against strong resistance, capturing Menton but falling short of broader objectives.
01 / The Origins
Benito Mussolini sought to eliminate Anglo-French dominance in the Mediterranean, reclaim territories considered historically Italian (Italia irredenta), and expand Italian influence in the Balkans and Africa. France and Britain had attempted throughout the 1930s to keep Italy neutral, but Germany's rapid military successes between 1938 and 1940 made Italian intervention on the German side effectively inevitable by May 1940, prompting Italy to declare war on both France and Britain on 10 June 1940.
03 / The Outcome
An armistice between Italy and France was signed in Rome on the evening of 24 June 1940, taking effect just after midnight on 25 June, simultaneously with the Franco-German armistice. Italy retained the small occupied zone, a demilitarised strip was established on the French side of the border, Italian economic control extended into southeast France to the Rhône, and Italy gained rights in certain French colonies. The CIAF was established in Turin to monitor French compliance.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Benito Mussolini.
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.