Troops lining up behind a wall, hedge or other obstacle can adopt a position to defend it. The front rank is moved right up against the wall to show this. Enemy who wish to attack the defenders can do so by charging them as normal. Attacking models do not have to physically cross the obstacle, indeed they are unable to do so whilst it remains defended, and instead the front rank is positioned on the opposite side of the obstacle to the defenders.

If attacking an enemy behind a wall or a hedge, inside a building, or behind some other defended obstacle you will require a 6 on a D6 to hit. It is very difficult indeed to hit enemy in these circumstances. This penalty applies to a unit that is attacking troops which have already taken up position behind the defended obstacle. The penalty does not apply to both sides in the combat even though the obstacle lies between them. The defending side has the advantage of already taking up a good position with its weapons sticking out or over gaps in the hedge or wall, whilst the other side must mount an assault in the face of a wall of sword points or spear tips.

The attacking side continues to suffer the '6 to hit' penalty until it wins the combat. Once the attackers have won the combat they are assumed to have climbed over or onto the wall, and further combats are fought as normal.