User blog comment:Kazanshin/Joseon Warrior vs Conquistador/@comment-2600:1700:F7B1:4D20:4461:9222:E23C:EFF0-20180601011625/@comment-35617681-20180601151228

Yeah, I also looked up what the Joseon Warrior wore during their reign, and got a number of answers. There was the iron lamellar I mentioned, the brigandine you brought up, and even (Oddly enough) steel plated chainmail. I just picked the armor type that I thought most resembled the kind shown in the picture of the Joseon Warrior above. You could be right, I'm just not sure.