Combat force would be like a moving piece. moving the stones. Stone or piece. There is a feature that lies firmly on the ground and in that motion. Wood, pastes or rectangular stone stable. Wood or stone sphere will move easily.
The move was forced to battle to be like a rock or log. Stone or timber that A feature It sits firmly on the ground. And mobility in a steep Wood or stone to place a rectangular solid. Wood or stone spheres to mobility.
.Force battle is like moving stones or logs, rocks, or move the log, you look, will stand firmly on the ground. Movement and easy in the slope. Wood or stone in the square to lay the steady.