Originally posted by Psychotron
Yes, but they're specifically trained to fight with armor on. Taking it away gimps them hard.
No, knights are trained to fight both in and out of armor. It would be completely stupid to train fighting men that couldn't fight without armor. And in fact, knightly duels were mostly done without armor, and this fight is basically a duel.
A modern-day soldier doesn't automatically forget how to shoot a gun if he's not wearing fatigues.