How far will enemies swim to get around a wall?

[Cellar_Cat]

I built walls down to the sea, then several lengths into the sea, but they greydwarves that spawn outside still approach the wall then swim around. They even go out there to kill the raft I used to build the pier.

They don't spawn there, there are benches all over my base. But they just path in from outside no matter how inconvenient I make it. Will I have to even wall in my ships?

[daggaz]

Pretty far. And trolls can wade, though they are more likely to get stuck on your fence. I found that I needed to build a small walkway on the inside of my palisades, in order to extend them further out into the sea.

Eventually you get it about 5 or 6 lengths out and they stop pathing, at which point heavier invasions start and you need a moat anyhow. My favorite so far is to find a nice size mini island close to the mainland and just plop a big fort on it. Make a bridge with a small gap in it. Nothing will path in, anchor ships on the far side and they are safe, and invasions are moot at least until you get drakes. Plus it looks cool.

[Samoth]

how adept are trolls at crossing water, anyone?

[haut/bas]

I not try this but thinking, how about using Sharp stakes along the walls?

[Ashley]

Just fine. Just until draugr shoot bows at you from underwater.

[Jaxx]

from what i notice trolls are either walking into the deepest part then just wade without going further or maybe they just stop at certain point but skeletons can walk under water from very far. I built my base out in the water, i raise it up pretty high not even can reach it if can stand on water. The bridge entrance have a mode around it wide enough trolls can't cross it but small enough i can jump across it and deep enough other critters can't get out when fall in it. The only thing I worry about are the drakes...but so far they didn't come near the base but only destroy something left out in open by the bridge entrance. i also build a very high wall around my long boat. nothing getting thru this. But if they do i can rebuild it no prob. i build same type base by the swamp too so far so good.