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In page Box (torture):

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  • The technique, then known as the "sweat box", was used for punishments in the Union Army during the American Civil War.[2]
  • The Tarrafal camp, in Cape Verde, used a small windowless shack as a form of torture against prisoners, most of them convicted of conspiring against Salazar's regime in Portugal.[citation needed]
  • The North Vietnamese Army used the technique at the infamous Hanoi Hilton.[3]