In this article I'm gonna show you how to make a trench scenic base.
You will need PVA glue, a popsicle stick, sand, a pair of scissors or a pair of cutters and your base.

Cut up the popsicle stick with the cutters.
Add some PVA to the base.
Spread out the PVA with a piece of the popsicle stick.
Add your popsicle stick pieces to the base.
Add sand.
Shake of the excess.
Let it dry and you're done!
Some finished models from my IG army:

If you do have problems with the model coming off the base you can always pin the base through the foot of the model for added strength.