In my Templar campaign from my AAR (Turn 26):
http://www.twcenter.net/forums/showt...=315673&page=2
I defended Jerusalem against an army twice as large with nothing but Pilgrims (as well as my faction leader a single unit of templar spear).
Then turn 42 (second battle):
http://www.twcenter.net/forums/showt...=315673&page=3
I was outnumbered about 2-to-1 and the enemy decided to attack my weakened forces that were on the south side of Al Aqaba when my full stack was on the north side. Because both armies had laid siege, the garrison could join the battle whereas my full stack could not
In the Jerusalem battle, admittedly my Faction Leader was the key. They had a mere captain, and the AI was intent on assaulting as opposed to trying to attack my cavalry, and Hugues racked up most of the kills.
In the other battle, I wasn't sure I was going to win it. Thankfully though, my defensive position and the fact that they had to march across the entire battlefield may have thankfully made a difference.
In the later turns of that game, outnumbered, I devastated a full Mongol stack with my own full cavalry stack, and took only 150 casualties. Of course, the advantage of having 20 units of cavalry can't be denied
In all the above, I have screen shots of both the stats and the battle itself.