Automatically regroup when falling back even when at less than 50%. Enemy advances are treated as a new Assault (enemy striking +1A the following turn). If the enemy does not advance, the Space Marines can move, shoot, and assault as normal in their following turn.

Modifiers:

add error Invictus can only have one 1st Company bodyguard unit.

and

1+ selections of 1st Company Command Squad in parent

1+ selections of 1st Company Terminator Assault Squad in force (recursive)

1+ selections of 1st Company Terminator Squad in force (recursive)

1+ selections of 1st Company Space Marine Veteran Squad in force (recursive)