North African Meat Grinder -or- How to Obliterate a Perfectly Good Numidian Army and Still Have Time for Lunch

I recently painted and based a Numidian army, using figures from Nick Grant's Canterbury Miniatures.  In September I mustered them against Troy Stair's Polybian Romans.  Troy is my regular opponent, and also cleans my pool.  Yep, just call the good people down at "Scum Be Gone" for quality service with a smile.

Click for larger image...

I rolled as defender and placed rough terrain within easy reach of any side of the board, so that my psiloi could hide in it and force Troy's blades to fight on something like even terms.  He selected the far edge and got it, wisely deploying in the most open section of the field.  The opening is photographed above.  My plan was to lure him in with a small battle line in the open, then smash his flank with psiloi (who would charge down the hill at left) and swarm his left with light horse.  Should've paid closer attention to those buzzards circling overhead...

Then, and this kills me, as his wall of blades advances I... sniff... I send the light horse in early, as HIS LEFT FLANK IS ANCHORED ON THE WOODS AND HE HAS SPEAR SUPPORTED BY PSILOI, FOR A BIG +5, GUARDING SAID FLANK.  Oh the humanity...

He destroyed me.  Oh, it was ugly.  He killed my general and four other elements, and I did absolutely nothing to him.  Friends, if you make a flank attack, make sure there's a flank to attack.