Orcs – discussion about the race.

I think in a game like this, it's quite the opposite; an Orc has little chance against a Knight.

Oh, no!!! Even with training, Orcs have a great chance of winning. The main unit of the Knights is the Paladin, but they won't be able to spread out because the Paladins will move before them and simply stand in front of them... and there's a lot more... in general, IMHO, the Stronghold will win if played well.