Submarines for P.T.O. 4 - PlayStation 2

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The only country that submarine warfare is effective against (killing transports) is Japan; who is desperately short of both steel and oil. Submarine attacks as fleets also lose their effect once the war goes past one year (Sonar, Hedgehog, etc., makes life ugly). If the enemy (especially Germany) attacks with solely Submarines, retreat your Fleets. Submarines cannot hurt airfields, and the game's AI will give them a kill or two if you hang around; especially against your capital ships (carriers and battleships).

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