Finger and Toe gives your troops a relatively safe place to walk around with the release of their 28mm Earthworks core set paper terrain pdfs.
From the release:
Earthworks is designed to allow you to quickly and easily build small fortifications and siege works for mass battles or skirmishes. From Roman through nineteenth century, although field works changed, they fulfilled the same function: protect the troops in the field and keep the enemy out. Now you can do just that. Earthworks is modular and designed for standard units of one inch high walls based on 4×4 inch base plates, but you can easily build sprawling works of your own design. So, “Once more into the breach, dear friends.”