A BUA for my Commenan Byzantine Army
The structure is made completely of corrugated cardboard from a box and cardboard from a Mountan Dew soda pop12-pack. The latter is good material because one side accepts glue well while the other side has a glossy coating.
This coating allowed me to score the opposite side, thus creating a sort of hinge that was very useful for the towers. A singly based 15mm figure could stand in each of the tower tops and about four could stand on each of the walls. The inside can accept a garrison measuring up to 40x40mm.Elmer's white glue, all-purpose filler and super glue (CA glue) hold it together.
The scenic materials are various sizes of Woodland Scenic ballast, Life-Like grass (bright, small dyed wood chips) and some common rocks.
The trees are cut "pipe cleaners" available from a craft store. What you can't see is how they are easily removable. Their bottoms are plastic pegs, cut from a plastic rod.
I used a pin vise (tiny hand drill) for making a center hole in these pegs, into which I twisted the "trees." The pins sit in holes drilled into the BUA's base. I did this so the trees wouldn't get twisted when transporting the BUA.