- Coat of plates; jack; jakke.
- Protective padded jacket similar to an aketon. It was commonly used by infantrymen and it often had the added protection of metal plates.
- These could have the colours or heraldic device of a given lord or army sown on. In the Chronicle of King João I, part 2, Fernão Lopes says that after their defeat at the battle of Aljubarrota (1385), the retreating Castilians turned their "jaques" inside out in order not to be recognized, though they were betrayed by their tongue whenever they spoke. [João2, ch. 45: 46]
- See: Gouveia Monteiro, A Guerra em Portugal nos Finais da Idade Média (Lisboa: Editorial Notícias, 1998), p. 542-543.
Chronicle entries in which Jaque appears:
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