The Italian Co-Belligerent Navy (Marina Cobelligerante Italiana), or Navy of the South (Marina del Sud) or Royal Navy (Regia Marina), was the navy of the Italian royalist forces fighting on the side of the Allies in southern Italy after the Allied armistice with Italy in September 1943. The Italian seamen fighting for this navy no longer fought for Italian dictator Benito Mussolini. Their allegiance was to King Victor Emmanuel and Marshal of Italy (Maresciallo d'Italia) Pietro Badoglio, the men who ousted Mussolini.