Ok, simple but complicated at the same time.
I have a tin and copper mine in a cave, and no iron yet. The cave has 1 entrance, i want to guard it.
I have a palisade around my main compound.
I have claimed the land inside the compound.
Obviously i should wall off the entrance to the cave, and claim it, but how should i go about doing this, 2 palisade cornerposts with a gate? That seems rather costly.
Is there a better method?