For map #10 of the campaign, this one is surprisingly easy and quick. You really need to screw up a lot to lose this map. Just don't fire point blank in the naval battle, take a little care of your two battleships and see if you get an opportunity shot with your heavy artillery instead of moving it east towards the front. Take the Depot and set up a frontline out of range of the enemy bunker.
By the time the medium artillery from the island factory in the NW reaches the front on the southern landmass, the battle will be almost over. Build a few more planes for later use in the final assault. Once the naval battle is over, use your battleships for land bombardment.
