Occasionally the enemy will have an overwhelming superiority in numbers, with wave upon wave of foes hurling themselves forward. To represent the size of an attack like this, the player making the Sustained Attack can 'recycle' some of his units when they are destroyed. Recycled units are brought back into play to represent the almost limitless supply of reinforcements.
Any Troops unit (ie Troops choices on the force organisation table) which is wiped out may move on from the attacking player's own board edge or either of the short table edges outside of the enemy deployment zone. They move on at the beginning of the attacker's next turn.
Units which are forced to fall back and reduced to less than 50% strength (ie are unable to regroup) can be removed from the table immediately and re-used as if they had been wiped out. They do not have to fall back completely off the table.
Destroyed vehicles and HQ units cannot be recycled. Note that this includes transport vehicles for Troops units and Command Sections for Imperial Guard infantry platoons.