Just to add, there used to be something in the lore where many Redguards value Dwemer armor. This probably due to a large amount Dwemer ruins within Hammerfell and are entwined into Redguard lore.
The Redguard country of Hammerfell is named after a Dwemer ruin.
Redguard going into the military have to first brave a Dwemer ruin. I'm guessing this is why Dwemer armor became a part of Redguard lore. Dwemer is a heavy armor.
I don't want to take credit for this but I read somewhere that the test for a redguard warrior is to go into a dwarven ruin and bring out materials for his armor. So you gotta think that the warriors fashion some variation of dwarven armor.
We literally just went over this misconception in another thread. The First Pocket Guide states that Redguards who want to join the Knights of the Scarab "must sail to the Dwemer Ruins of Stros M'kai, to avoid its deathtraps and 'wrestle its mechanical men back into shape'." It doesn't say anything about "Redguards joining the military" (and, btw, it had just mentioned that Hammerfell had no standing military.) The text only refers to a very select group of Redguards, and it makes no mention of a Redguard affinity for Dwarven artefacts.
And, on top of that, it's information from a text that's hundreds of years out of date.