
PC is using two weapons, so dual wield is a TH feature. However, as the text says: Marauder didn't manage to utilize any disarming skills!
Disarm is the signature action of the roguish style. When a person is disarmed, he can't equip another weapon for 2 rounds and will have to use hand to hand techniques or switch to defensive directives. If it's a critical roll, the victim will suffer for 3 rounds.