England: North Sea and Irish Sea
France: Burgandy, Picardy, Mid- Atlantic Ocean, and English Channel
Germany: Heligoland Bight, Ruhr, and Baltic Sea
Italy: Ionian Sea, Piedmont, Tuscany
Austria: Tyrolia, Galicia, and Albania
Russia: Ukraine, Black Sea, and Barents Sea
Turkey: Armenia, Aegean Sea, Eastern Mediterranean, and Black Sea
Remember, for each of these powers the territories aren't listed in any particular order. Just trying to throw candidates out there.
Turkey: