The Romans had two-gladius fighters in the arena, as well as net and trident. American Indians sometimes used knife and tomahawk, also (taking dime novels as the 19th C heroic sagas).
Then there is the Viking two-javelin use that was claimed for some king (the name Trygvasson sticks in my mind, here).
Again, only one-on-one dueling. OTOH, that is what heroes engage in the most. The battleline is for the nameless hordes, the Myrmidons (why do you think they called them 'ants'?) as opposed to their prince, Akhilleus, or his companion Patrokles.
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