Palisade
Good fences make good neighbours.
The Folktails wall. It blocks everyone, friend or foe: a Gatehouse lets your side through.
Manning the wall
Click a wall with troops selected and they line up on its walkway around that spot and hold there. N sends the selected troops to the nearest wall within 30 tiles. Troops on a wall take 20% less from shots, and melee blows can’t reach through it.
Holding water
A palisade holds back water like a dam. With Dam pressure on, too much water behind it and it gives way (see Dam pressure).