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It’s safe to say the early part of the second world war did not go well for the British Empire or its allies. But though defeats in Europe and the loss of France as an ally were serious disasters, the top of Britain’s government remained in no doubt that the greatest threat to their survival and the continuation of the war was to be found at sea, in the form of German U-Boat submarines which for four long years would terrorise the Atlantic and threaten the suffocation of Britain’s entire war effort.

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0:00 - The U Boat
2:10 - The First U-Boat 'Happy Time'
4:57 - Surfshark VPN
6:10 - America's Undeclared War Against the U-Boats
8:34 - US Navy put ships in convoy challenge (impossible)
10:00 - The U-Boat's damaging impact on the US war economy

Credits:

Animation for this video by:
https://twitter.com/Scuffed_Lund
https://twitter.com/addaway23

Artwork Lead:
https://twitter.com/ChrisbyFlanker

Written, Directed and Produced by:
https://twitter.com/addaway23

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Sources:

Evan Mawdsley, The War for the Seas
Corelli Barnett, Engage the Enemy More Closely
Phillips Payson O’Brien, How the War was Won
Captain Stephen Roskill, The War At Sea, Vols 1-3
The Defeat of the Enemy Attack on Shipping 1939-45, ed. Eric J. Grove

Music Credits:

"Rynos Theme" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/

"Crypto" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/

"Stay the Course" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/

Other music and SFX from Epidemic Sound