I remember my Makedonian Royal Cavalry army (Made mostly of Hetairoi and Thessalians).
I remember ordering 3 Hetairoi units to attack the flank of a cheap Ptolemais phalanx unit.
I remember zooming in on the backs of the phalanx (Not seeing the charging cavalry)
I remember that once the cavalry hit the flank, it was absolutely like a tsunami, every phalanx soldier disapeared from sight, and when the Cavalry moved to attack another unit (The camera remained still in the same place) there were no phalanx soldiers left whatsoever. All dead. That was awesome. An entire unit (120 soldiers) consumed in 10 seconds.