DukeRustfield wrote:"If the cannonball bounces into impassable terrain that would, in reality, stand in the way of the shot, such as a sheer cliff, it stops immediately."
It's not "impassible" but it would "in reality, stand in the way."
"if the cannonball bounces into an obstacle, the obstacle is destroyed but the cannonball" stops.
So a hedge will stop a cannonball but a hill won't?
I agree with you here; a cannonball won't bounce 'through' a hill. Off the crown, yes. Maybe even over the crown from a suitably close point on the front, but not through, no.
Also, you do need line of sight to attack a unit.
Unless the rules say otherwise. Check Stone throwers and Hexes for other instances when
LOS is not needed (Hexes might not be considered attacking).
You can say you're attacking the point in front of the hill, but why on earth would your men fire their cannon at a random point in front of a hill unless they knew something was behind it which thier magic cannonball might hit?
This is a fluff argument and invalid in
YMDC, but for completeness' sake, I'll respond. They'd shoot there because you (the general) said to. No more, no less.
You obviously have to make a check to the target units because you are required not to have even a "chance" of hitting enemies in close combat or your own units. So that means you have to draw a line and know what's there, whether you can see it or not. It could get really ugly where in the same situation enemies were in close combat behind that hill and you shoot at them. "I'm just shooting at the point." /innocent whistle
Note that 'You' (the player) must make sure that there is no chance that the cannon cannot hit friendly units or enemies locked in combat, not the unit. If checking this required the unit to have
LOS to the entirety of it's possible path, the game would break every time the cannon attempted to shoot at a valid target it had
LOS to but not beyond (such as when it's not on a hill). Following this logic would mean cannons not on an elevated vantage point could quite possibly spend entire games being unable to shoot.
EDIT: Also note that you only need
LOS to the initial spot (target). The cannonball will
never bounce from this spot. The bounce will always occur 2-10" further afield, or it will misfire. Not even obstacles or impassable terrain stops the overshot. Only on the bounce do these things matter.
Raw, it is quite possible to pick a legal target on the front of a hill to overshoot far enough to land on a spot on the rear of the hill and bounce (still legally) from there.