In my Great Britain game in the Hegemonia Mod, I started WW2 (Commune vs League of Democracies & Holy Roman Empire). I successfully secured Paris, Normandy, and Brittany, dividing the rest of France with Germany and Iberia. The Lombard League left the HRE and joined the League.
Also, during the Pre-War years, I embarked on a massive naval building program to rearm and expand all of my separate fleets (the Far East Fleet (Port Arthur), the North Sea Fleet (Scapa Flow), the Channel Fleet (once Portsmouth, now Cherbourg), and the Atlantic/temporarily Mediterranean Fleet (initially Gibraltar, then Genoa, now Naples)). The created-from-scratch Med. Fleet, headed by the carrier HMS Illustrious, has scored it's fair share of victories against the Commune navies:
(Fail cutoff on the second picture, but I was just too anxious about how awesome this ship is
)
From about 1943 to mid 1946.
EDIT: Just took out two more ships, the battleships
Consul and
Proletarian.