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This introduction of 'The Fairbairn Fighting System' at Camp X in conjunction with input from many highly skilled Instructors with various backgrouds and fighting skills would be the beginning of the evolution of "DEFENDO". As Close Quarter Battle or Unarmed Combat training progressed throughout this period, it was added to and refined utilizing western fighting principals, eventually becoming reffered to in slang as "DEFENDO" by Allied soldiers.
