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Japanese Submarine Offensive

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  • grognard
    replied
    And the U.S. did have anti-submarine aircraft patrols in place before the conflict started. Given ASW warfare, a Japanese SS assault would have prolonged the war, but not by much.

    But remember Japanese doctrine was always attack the combat forces, not the logistics and it hurt over and over again--The Battle of Savo Island is exhibit A.

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  • johnbryan
    replied
    Originally posted by granite View Post
    I have one more option: Close shipping through the Panama Canal while neutalizing select ports w/ US Navy bases in them. Now you've crippled US response and reinforcement giving the IJN a free hand for a long time, maybe even long enough to convince the US to give up. (Personally I doubt it though after Pearl Harbor. No matter how long it takes.....)

    True to a point, except that the US Army Corps of Engineers saw into that possibility many years before and actually designed and built replacement doors for the locks that vented into the Pacific and Atlantic Oceans.

    After the initial Japanese attacks upon them, they would have had the Panama Canal up and running again in a few days time.

    Lastly, the US Navy was far too powerful to allow the neutralization of select ports on the western shoreline to ever occur. Convoys would have been much more heavily defended by ad-hoc ASW forces, until replacements could be found or built and things would have proceded much the way that they were carried out throughout the European Theatre of Operations.

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  • granite
    replied
    I have one more option: Close shipping through the Panama Canal while neutalizing select ports w/ US Navy bases in them. Now you've crippled US response and reinforcement giving the IJN a free hand for a long time, maybe even long enough to convince the US to give up. (Personally I doubt it though after Pearl Harbor. No matter how long it takes.....)

    Leave a comment:


  • johnbryan
    replied
    Originally posted by piero1971 View Post
    it would be avery good idea. certainly meaning evn more of Jap subs sunk and faster, but with more effective effect on US supplies (who would be gigantic anyways with hundreds of escorts built (ok, that would delay resources for a BB or two...).

    in the end, it would gain Japan a few little wins, but not much
    Agreed. The actual Japanese Navy's Submarine doctrine was far too skewed to be truly effective during WW II. Everything about the IJN's entire existance was centered around some future Pacific Ocean Battle of Jutland that would destroy much of the US Fleet's Battleships and support ships while leaving the Japanese in complete control over much of the Pacific. They saw their submarines as being guarentors toward that end and wasted little time in making attacks against merchant ships that could have done real damage to the Australia, New Zealand lifelines.

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  • piero1971
    replied
    it would be avery good idea. certainly meaning evn more of Jap subs sunk and faster, but with more effective effect on US supplies (who would be gigantic anyways with hundreds of escorts built (ok, that would delay resources for a BB or two...).

    in the end, it would gain Japan a few little wins, but not much

    Leave a comment:


  • johnbryan
    replied
    Originally posted by Parasocko View Post
    As commander of Japans Submarine force, you have closely studied German Uboat tactics and successes. You develop a supply sub along the lines of the German 'milch cows'. You are aggressive and believe that the industrial might of the US will crush Japan if you do not act swiftly. You have several options but cannot execute them all. You have enough subs to successfully execute 1 strategy.
    1) Attempt to blockade the Hawaiian Islands with the goal of forcing the US Fleet to withdrawal. This includes wolf packs along the LOS to the states
    2) Attempt to close down the western seaboard
    3) select key points and attack all shipping, hoping to neutralize certian ports, i.e., San Francisco, San Diego, Seattle while leaving the rest ofd the coastline free
    4) interdict the sealane between the US and Australia
    My guess is that the only option with any chance of some success would be to interdict the sealanes between the US and Australia. In the end though, any of these options would hasten the creation of US Navy Hunter-Killer ASW groups specifically detailed towards the destruction of any and all Japanese submarines.

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  • Parasocko
    started a topic Japanese Submarine Offensive

    Japanese Submarine Offensive

    As commander of Japans Submarine force, you have closely studied German Uboat tactics and successes. You develop a supply sub along the lines of the German 'milch cows'. You are aggressive and believe that the industrial might of the US will crush Japan if you do not act swiftly. You have several options but cannot execute them all. You have enough subs to successfully execute 1 strategy.
    1) Attempt to blockade the Hawaiian Islands with the goal of forcing the US Fleet to withdrawal. This includes wolf packs along the LOS to the states
    2) Attempt to close down the western seaboard
    3) select key points and attack all shipping, hoping to neutralize certian ports, i.e., San Francisco, San Diego, Seattle while leaving the rest ofd the coastline free
    4) interdict the sealane between the US and Australia

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