River transport question

[satisfaction]

How many gunboats (or ironclads if you have a bunch laying around I guess) does it take to prevent your opponent from using river transport? By this I mean the kind that is initiated by the use transport button for movement.

[Rafiki]

I don't think you can stop that as such by using gunboats/ironclads, but your stacks will try to engage any such staks moving by (as any other stack). Dunno which "river stats" such stacks have, but I imagine they must be worse than actual transport units.

[satisfaction]

What I'd like to try and do is find a way to prevent the use of this type of transport behind my lines. I remember some discussion on this awhile back.....I'll look around in the old postings and see.