[1] The first written reference to a hyeopdo is in a Korean martial arts manual from the 17th century called the Muyeyebobeon Yeoksokjip (무예예보번역속집).
The hyeopdo was considered an important weapon because of its effectiveness.
In the Muyedobotongji, another martial arts manual, one form for use is given, called hyeopdo chongbo (협도총보, 挾刀總譜).
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