Cult Ambush: When a unit Infiltrates or arrives from reserves (or ongoing Reserves) you can "Ambush" rather than appear on the table normally. This means roll a dice and see what happens:
Cult Reinforcements: Unit shows up from your table edge as normal. Possibly the worst result unless you planned to move them to the backfield anyway.
Encircling the Foe: Unit Outflanks, appearing from a random side edge.
Lying in Wait: Place the unit anywhere on the table more than 9" away from an enemy, or 6" if that unit can't see you.
A Perfect Ambush: Place the unit anywhere on the table more than 6" away from an enemy. Full Stop.
A Deadly Trap: Same as above, but your unit may immediately make an out of turn shooting attack with the pinning rule. If they have no guns, they get a free run move.
They Came From Below: Place the unit anywhere more than 3" away from an enemy, you may charge the turn you arrive.