Dacian Falx vs. Roman Helmets & Armor

[Dan Howard]

* At the end of the Middle Ages, men in full plate armour also frequently used two-handed weapons - 'Great'swords, bills, halberds etc and were fully protected - a very lethal combination.

Except that none of these were particularly good at cutting through plate. They were used like prybars and can openers to get into the gaps. The chance of actually cutting through plate armour far enough to seriously injure the person underneath it with any hand-powered weapon is too low to be considered an effective means of attack.