Quote Originally Posted by Kommodus
Between billmen and Swiss halberdiers, it seems to me that billmen generally have slightly better combat stats, but Swiss halberdiers have better morale. My preference is for the billmen.
Billmen are awesome for the English. If you train them in Mercia and with a good command general, they should like get V4-5.

That's enough to make minced meat out of most units the AI throws at you.

And they're good against infantry as well. They're good against anything as long as they're not overwhelmed. Only way to stop them (for the AI) is to use annoying horse archers.
For some reason Billmen are outstanding when storming a fortified position. They should get morale penalties for getting overwhelmed (only a small hole in the wall to go through) but I've seen them hack up units in no time.

My conclusion is massed Billmen can take out most things in sieges, although I rely mostly on spears, swords, longbowmen and cavalry on the battlefield for some reason.