The spetum is a medieval polearm. It consists of a staff of about 8 feet in length with a long double edged spearhead with two short diagonal blades that are angled back from the spearhead. These were added to make the weapon cause additional damage as it is pulled out of a victim.

The spetum is related to the ranseur, but is a lot more deadly. This particular polearm did suffer the problem of getting stuck in the body of any enemy (the side blades would cause this). Like all most polearms, the spetum is best used in a formation of troops, as its length makes it easy to avoid a lone soldier using one.