Today we take a look at the first half of the second year of the USN's pacific sub campaign, things are getting better, but the Mk14 continues to dog progress.

Sources:
www.amazon.co.uk/Unrestricted-Warfare-Officers-Submarine-Victory/dp/047138495X
www.usni.org/press/books/silent-victory
www.amazon.co.uk/Silent-Service-World-War-Submarine/dp/1636241263
www.amazon.co.uk/Sink-Em-All-Submarine-Warfare/dp/1387400738

Footage from US National Archives video codes:
428-NPC-629/2740/13396/14159/15499/15514/15888



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