Dutch Submarines at the start of the Pacific Campaign - 'Ship a day' Helfrich leads the charge!

Today we look at the opening months of the submarine campaign in the Pacific to see what the Dutch were getting up to whilst everyone else was absent or wishing for working torpedoes...

Sources:
https://www.history.navy.mil/research/library/online-reading-room/title-list-alphabetically/j/japanese-naval-merchant-shipping-losses-wwii.html
http://www.dutchsubmarines.com/start.html
The Great Circle - Vol. 43, No. 2, Special Issue: Submarines (2021), pp. 62-74
http://ahoy.tk-jk.net/macslog/DutchSubmarinesinWorldWar.html
https://www.amazon.co.uk/Submarines-Illustrated-History-Weapons-Warfare/dp/1851095632
https://www.amazon.co.uk/Conways-Worlds-Fighting-Ships-1922-1946/dp/0851771467
https://archive.navalsubleague.org/1993/dutch-submarines-in-world-war-ii-the-far-east
https://www.rnsubmusfriends.org.uk/hezlet/volume1/chapter12.htm
http://warfare.gq/dutcheastindies/

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