Billhook

The bill is a polearm weapon used by infantry in medieval Europe. The bill is similar in size, function and appearance to the halberd, differing mainly in the hooked blade form. Other terms for the bill include English bill, bill hook or bill-guisarme.

One advantage that it had over other polearms was that while it had the stopping power of a spear and the power of an axe, it also had the addition of a pronounced hook. If the sheer power of a swing did not fell the horse or its rider, the bill's hook was excellent at finding a chink in the plate armour of cavalrymen at the time, dragging the unlucky horseman off his mount to be finished off with either a sword, spear or the bill itself. These characteristics also made it effective against heavily armoured infantry, dragging them into the melee or exploiting the weak points in their armour.