Attrition is the automatic loss of hit points due to being in certain types of terrain.
Method: attrition-in-terrain
For every unit not in a transport, this method computes the chance to lose hit points, then damages the unit accordingly. This method runs once per turn.
Table: attrition
u t -> .01hp
This table is the rate of loss of hp per turn.
The terrain used is cell or connection terrain as appropriate for
the unit's position.
Defaults to 0
.