Companion weapon

The term companion weapon is used in historical European martial arts to refer to an item used in conjunction with the larger weapon in the non-sword hand while fencing with a rapier or sword. The popular companion weapon forms include:

Twin swords, made to fit in one scabbard. One of the swords is used offensively, and that other as main gauche

In most cases the off-hand weapon is used to deflect or parry.

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