If I attack a unit and get a Defender Shattered result the defender looses one step, retreats two hexes and is marked with a full retreat marker. My attacking units get a Breakthrough Advance. My question is when my units advance and move next to the Full Retreat unit does it have to stop as it has entered an enemy ZOC? Secondly, does the enemy unit in Full Retreat have to retreat a further two hexes immediately, i.e. In my turn, or does it retreat in the enemy players turn. I am assuming the immediately means that it retreats two hexes at the instance my unit moves adjacent to it? If so, does my moving unit therefore have to stop as it has moved into an enemy ZOC or can it carry on moving after displacing the Full Retreat unit?