I would be happy to besiege the place, I love the rubble sections.
Thank you! I dont know how practical it is, but, to be as realistic possible, I made these sections intact at first place and then I had to destroy them with a sharp knife

The wall sections, being hollow, were filled in the gap with toilet paper soaked in PVA glue, then, covered with earth and (cork) bricks.
The destroyed ravelin earthworks had to be literally excavated without destroying the paperwork! (I put on purpose layers of cork underneath).
Then, Miltiades put the supports of the trenches, the earth and finished the job with painting and drybrushing.