Cavalry on Road Issues
Certain issues have been revealed about cavalry stands on a road contacted in front or rear for melee. The situation is as follows:
Individual stands always cause Incremental Hits, not Red Casualty hits, either firing or melee, just like Skirmishers.
When a unit is on the road and getting the bonus for it, it cannot be in "deployed" fashion; it is assumed to always be in march column, therefore only the front stand can fire and melee and the rear stand melee.
When contacted in rear, the last stand of the cavalry unit (it cannot about face to fire) is said to be able to about-face and face the enemy upon initial contact.
In truth, these front and rear stands cannot comprise more than an actual company, so if contacted by an entire infantry unit in front or rear, the amount of enemy infantry fighting is the entire battalion (because we cannot know for sure how many can actually be involved), or at the least, even if the entire infantry battalion was getting a road bonus and thus would be said to be in march column, we ignore the reality because the infantry is based as an entire unit in the first place; the cavalry is not: cavalry always represent one stand = company or squadron. Therefore, the infantry will cause Red casualty hits and the cavalry stand only Incremental Hits.
Thus, the front and/or rear cavalry stands will rout leaving the next cavalry stand to be the next to fight. This continues until the entire cavalry unit is either routed, destroyed or miraculously wins.
The lesson here is DO NOT allow your cavalry to be engaged while in march column.
The reason this is important is that the cavalry might be caught either on a bridge or on it and both sides of the bridge because of it's length; the size of the unit is much larger than an infantry battalion.