05/01/2016 5:52 AM AEDT | Updated 15/07/2016 12:51 PM AEST

The British Soldiers Who Gave Their Lives To Crack The Enigma Code

The Petard Pinch from Mike Brookes on Vimeo.

As a Nazi submarine began to sink in the middle of the night in 1942, German soldiers retreated. It was World War II and they had been pursued by British warships, ultimately losing the battle.

With the vessel likely to take one last gasp before water would rush in and send it plunging to the ocean floor, three British soldiers stripped off their clothes and dove into the freezing Atlantic waters.

They would swim directly past their enemies making their way to the doomed submarine, purely in the hope of finding Nazi documents and secret code books which could help unlock the German Enigma Code -- a coded language developed by a machine with 159 million million million possible settings.

In this documentary The Petard Pinch, the gallant efforts of these three British soldiers is told through animations reminiscent of 1940 propaganda posters. It was a story that took decades to come to surface.

The Germans believed the Enigma Code was unbreakable and successfully used it to coordinate deadly attacks against their enemies -- including Britain, Australia and America -- on the battlefields.

The British and American allies knew the longer it remained unbroken the more lives that were at risk.

Lieutenant Francis Anthony Blair Fasson and Able Seaman Colin Grazier ultimately lost their lives as they passed on these vital documents to Thomas William Brown.

Brown was able to see the documents safely arrive at Bletchley Park, Britain's top secret security division where a team of mathematicians were working on breaking the Enigma Code.

Fasson and Grazier's lives would not be lost in vain as those documents contained the key to the Enigma Code used by German U-Boats in the Atlantic and Mediterranean seas.

It was using those documents that the code was ultimately solved by mathematicians Dilly Knox, John Jeffreys, Peter Twinn and Alan Turing (whose story was told through the Oscar-winning film The Imitation Game).

The breaking of the Enigma code is ultimately credited with saving countless lives and with ending the war.

If it were not for the courageous act of Fasson, Grazier and Brown, it is unknown how long the war would have continued and what would have become of the allies.

The Petard Pinch was created by Mike Brookes. You can see more from the designer and animator over here.

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