Universal Rule.
If the unit Breaks from Combat, it is immediately removed as a casualty.
When checking if an enemy unit is Steadfast, your Slave units count as having 0 Full Ranks, unless the Slave unit is Engaged in the enemy unit’s Flank or Rear Facing.
When shooting into a combat where the only Engaged friendly models are Slaves:
● The Shooting Attack gains +2 to hit.
● When randomising to see which unit is hit, the intended target is hit on 4+ (instead of 3+).