Let us speculate on the subject of fantasy units...

[Kobal2fr]

I'm still surprised that over the course of many total war games and expansions, the scottish faction has yet to field that most dreaded of missile units - the caber tosser. The sight of hundreds of kilt wearing scotsmen, faces painted blue, carrying this traditional weapon is enough to crush the morale of even the stoutest of foes.

Admittedly the missile attack has a very short range, but any hit is a guaranteed kill. Also horses tend to trip over the used cabers, which is nice.

The scots often used this fearsome weapon with great success during their many conflicts with the english. At the Battle of Bannockburn, King Edward II was heard to mutter "I hate those scottish tossers".

Thank you, that made my night

Also, and obviously : the French Imperial Guard, a musketeer unit which can't shoot unless shot at first. "Messieurs les anglais, tirez les premiers !".

Or maybe Battle Guillotines, anyone ? :)