Hi Fernando,
perhaps not necessarilly a 'trident' but a trident 'headed' polearm. Millitary forks were a popular form, commonly two pronged ...but not all were. Usually used against horsemen but also foot soldiers.
The trouble is .....googling 'trident and weapon' usually brings up the nuclear missile ...and I suspect the armour would be little protection against such a weapon
Regards David
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