The Cipher Machine 41, the successor of the Enigma machine, used by Nazi Germany's military to encrypt strategic messages during World War Two, is on display at the Deutsches Museum | Reuters

817K views · 2.1K reactions | Germany's poor code skills cost them the First World War. In World War Two, they knew they needed something bigger and better. Enter the Enigma Machine, capable of an almost infinite number of combinations, and almost impossible to crack. But a team of Polish mathematicians were sure that everyone else was going about it all wrong, and set out to break the code for themselves. | War Stories | Facebook