[PvK]

It's been a while since I've looked at Abyssian units and I didn't recognize the demonbreds as commanders. Fire Archers won't target commanders, but it will, I think, target mages, so if it was just the one mage commander...

Ok, so with those hints, I expect (not with great confidence) then that there was a big central melee where the Abyssians probably killed or ignited (via heat aura) enough of Man's fodder that Man routed after not doing much injury to Abyssia's heavy infantry, but they were too slow to chase down whoever routed on Man's side.

PvK