Break Tests To reflect their strong morale and determination Space Marines are not subject to the normal rules for broken troops. Instead the following rules apply:
Space Marine units take Break tests as normal. However, if they fail their test they are not
broken and forced to flee, like other troops, but are shaken instead. Shaken troops may never move towards the enemy but may shoot, fight hand-to-hand combat and use psychic powers normally. Shaken troops may move away from the enemy if you wish, but do not have to do so, and individual models may pivot on the spot to face an enemy. If surrounded and therefore unable to move without approaching an enemy, they cannot move at all except to pivot on the spot.
lf shaken Space Marines are fighting in hand-to-hand combat then they may not use follow-up moves to engage other enemy models. The exception is that they may use a follow-up move to fight an enemy model which is already engaged against another Space Marine (the loyalty of a Space Marine for his brothers outweighs his trepidation). Shaken Space Marines may use a follow-up move to get behind cover even if this means moving closer to an enemy.
Once it has become shaken a Space Marine squad may recover by taking and passing a Rally test at the end of its turn. The usual conditions apply: ie, the squad may not attempt to rally if it is not behind cover or if the closest friendly models are broken.
If a Space Marine squad is shaken and fails a further Break test then it is broken and forced to flee exactly like any other troops. The advantage of the Space Marines is that they can effectively fail two Break tests before they are broken, representing their steadfastness and courage in the face of death. Once broken, a Space Marine squad may rally like any other unit, and if successful is restored to normal fighting condition in the same way.
Rapid Fire If a Space Marine doesn't move at all and is not in close combat, they can use Rapid Fire. Each Space Marine may fire their storm bolter, boltgun, or bolt pistol twice instead of once as normal. Other members in the squad using different weapons may still fire normally.