There's a vibrant sub-culture of people who practice "Historical European Martial Arts (HEMA)." This is not the Society of Creative Anachronism, though surely there's plenty of cross-over in North America, but people learning how to use European weapons to fight.
As I've been writing about, any sub-culture that engages the imagined European medieval past can easily become a locus for anxieties about whiteness and identity.
I've been made aware of a Tumblr on "Racism" in the HEMA community. This spring, I hope to talk to Ken Mondschein, who is researching this phenomenon, when we're both at a conference. For now, you can browse the tumblr.