Disarming guards while rescuing pirates side objective not registering

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In sequence 3 memory 2, one of the side objectives is to disarm and kill 3 guards while attempting to rescue the pirates. I have disarmed numerous guards in combat while doing this mission, but I receive no credit for this. Am I doing something wrong or is there something I'm missing? Thanks

Best Answer

By disarming they mean taking the guards weapon and ultimately killing them with it. This can be done by disarming them with bare-hands equipped. When you counter and disarm, with bare-hands, Kenway will take the guards weapon and then you can kill them with their own weapon(at least that's what I prefer to do).