Campaign map low res screens...

[Lord Adherbal]

suppose I gave you an axe, and tell you and your axe carrying friends to go and attack an enemy formation of halberdiers. Would you charge and crash through the enemy or advance with causion ? If you charge you'll most likely end up with a halberd spearpoint in your stomach.

and halberdier formations actualy fought simular to spearmen. They formed a dense wall of spearpoints to keep the enemy at distance, and then individuals would chop at the enemy with the halberd blade, or pull shields and weapons away with the hook, so that other halberdiers can stab at the exposed enemy. Later on halberds got a cross section on the handle that could be use to block enemy attacks.
None of this charge in the middle of enemy formation nonsense that you see in this video.