If any units from this Formation are in Reserve or Ongoing Reserve, they will arrive at the same time - if you need to make Reserve Rolls, make a single roll for all units from this Formation. When the Formation arrives from Reserve, draw a straight line from a point on any table edge to a point on the opposite table edge. Each unit from this Formation must attempt to Deep Strike onto a point on this line. And can re-roll the scatter dice when Deep Striking.
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