Thanks !
mmm... should I say something clever or should I confess the truth ?
Well let's go with the truth.. I didn't ... My opponent tricked me though his tactics.
The rules allow for those things. It is not that easy to redeploy once you commit because you have limited activations every other turn and many tactical options to counter the enemy actions to take advantage of a mistake, kind of like a chess game.
I was concerned that from the high ground the Uruk with a crossbow would be constantly picking my guys over the terrain so I planned to send my commander supported by a trooper and the horse archer to choke that flank.
As I did this my opponent cut through a diagonal with his uruks, the stronger soliders in his force. For me to react it meant wasting actions undoing what I had done.. moving across terrain to my left flank. My right flank I thought was an even fight, my weaker troops vs his weaker troops but as since his tougher guys reached the action before mine he got two turns of a good advantage. By the time my stronger troopers re-engaged the had to do at tactical disadvantaged combats. In Brink of battle small melees, even 2 on 2 models or similar change dramatically depending on how you engage. Takes time to explain but for example if I have a guy with a spear and a guy with a sword and I'm forced to engaged with my sword guy before my spear guy it could be disadvantageous. It is more complicated than that but that is kind of the idea and since all rolls are D10 opposed roles each modifier can tip the scales..
So the anaswer is.. how did the bait and trap was done ? ... My opponent outsmarted me
... Don't worry.. I'll get him next time !!!