Playing as the English recently I noticed that in some battles, the option on longbow units to plant stakes before battle was gone, and replaced by the usual fire flaming arrows button. I couldn't figure it out for a long time, but then I realized it was because the unit was very close to or on a road. Is this a bug or is it intentional? I guess it makes sense that you can't dig up a road to plant stakes, but it's still irritating.