I have now made a tutorial on how you can build a stone wall to your miniatures.
What you need
Static grass flock
Balsa wood 2.5mm thick
Grey spray paint
Bag of small rocks from a model train store
First you need to take a pen and mesure 20x2cm it will be the base of the fence, then you cutt it outThen you make one that is 20x1.5cm.
Then you take youre woodenfile and make the edges of your 20x2cm piece smooth.
And then you glue the 20x1.5cm balsa piece on top of the 20x2cm piece.
Then you cover the 20x1.5 piese in wood glue and put the small stones on it.
Let the glue harden then you spray the stones grey with model spray.
Then you paint the base brown or green ,then glue static grass onto the base and you are done :)
Here are a few pics with my Confederates behind the wall.
Hope you like my tutorial.