I'm on the road today, but will look around when I get home tonight.
I guess I should qualify my comment by admitting to making a quick guess. I've seen military krabi, but can't recall exactly the context. Also, I'm far from certain if the outfits they're wearing are military, which would make a pose with military swords more likely.
I'll amend my comment to say the swords look like krabi (sabers) to me, and look for some supporting evidence later.
In the meantime, maybe one of our Thai members will bail me out...