They decoded messages that had been encrypted on multiple levels, which was extremely complicated and crucial to military operations.
A group of approximately 10,000 women were secretly recruited and worked behind the scenes, breaking into German and Japanese communications systems. While men were fighting overseas, a different kind of battle was being fought by American women in WW2. Now, these WW2 codebreakers are getting the credit they deserve. The United States had a secret weapon in World War 2: young women who hacked military messages.
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