Gundestrup Cauldron depicting warriors with long shields and circular bosses.

 Gundestrup cauldron - Wikipedia

A line of warriors bearing spears and shields march to the left, bringing up the rear is a warrior with no shield, bearing a sword, and wearing a boar-crested helmet which resembles helmets from later Germanic cultures. Behind him are three carnyx players. In front of this group a dog leaps up, perhaps holding them back. Behind the dog, at the left side of the scene, a figure over twice the size of the others holds a man upside down, apparently with ease, and apparently is about to immerse him in a barrel or cauldron.