"Up Periscope" is the second mission of the Anglo Isles Campaign.
In this Level you are commanded by Colonel Windsor, and you learn how to the submarines for the first time.
You start of with your submarines and you submerge yourself to sneak past the enemies to get to the naval transports and frigates, then you go over to the docks and the battleship, you have to defend the docks from three waves of attack. Then transport your ground forces to Victory Island opposite the docks. From there the ground force infantry must capture the enemy base on the island to win.