Sometimes a unit will find its Fall-Back corridor blocked by impassable terrain and/or enemy models. Ignore enemy models that have fought in close combat against the unit this turn. A unit falling back may move around any obstruction in such a way as to get back to their baseline by the shortest route. If a unit cannot perform a full Fall Back move in any direction without doubling back, entering impassable terrain or coming within 1" of the enemy, it is destroyed.
Note: This replaces the Crossfire rules after an Assault.
Diagram: Trapped! The unit falling back in this circumstance could be trapped. However, if the terrain to the left is not impassable, they can divert their fall back into it. Also, if the unit in front of them fought them in close combat this turn, the falling back unit could move through them to escape.