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Arlington Hall

Arlington Hall was the headquarters of the US Army Intelligence and Security Command's (INSCOM) cryptography efforts during WWII. It was named for it's location in Arlington Hall Station, Arlington, Virginia—reconverted girls’ school. Arlington Hall was the equivalent of the UK's Bletchley Park installation. Together, they broke the Nazi Enigma cypher. Arlington Hall eventually became the National Security Agency or NSA.

The Arlington Hall effort was comparable in influence to other WW II-era technological efforts, such as the crytographic work at Bletchley Park, development of microwave radar at MIT's Radiation Lab and the Manhattan Project's development of nuclear weapons.

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