Arashi...
Honestly though, if you were to take anything from the picture, that cape. I see every infantryman carrying a cape for camouflage and shelter. If you could hide on sand dunes as well as use it for shelter in the night, you're pretty much set.
Also, the Arashi are supposed to be some of the most technologically advanced. I wouldn't put it ahead of them to be carrying tesla weaponry, ground-mounded Hwatcha, etc, though probably as a squad. Imagine the way cannons would be used, but somehow tesla. We talked a bit about IEDs. I'm also thinking traps buried in the sand, tripwires, barbed wire, maybe even electric fences. I also get the feeling that if anybody would get that ship on Dunes working again it would be these guys.
I feel like each soldier would carry some rudimentary tools for salvaging old scraps, seeing as that's how Arashi make their money and food.