Toss a large variety of weapons in the center of the field- just enough for everyone. Leave out shields. Everyone makes a circle around the weapons and walks 15 paces out from it. Once everyone is spread out around the weapons “Go!” is called by the Herald at which point everyone runs in to grab a weapon(s). (Fighting does not start yet!) Everyone then returns to their place in the ring around the weapon pile. The Herald then will call “Lay On” once everyone has a weapon and is back to their spot. The purpose is to force people to use fighting styles they wouldn’t normally use.
Another variant of this is to yell "Lay On" instead of "Go", meaning that the battle has started while everyone has no weapons.
Sometimes calles a Salad Battle.