Kalran: Tales of the four nations/Tent barracks

Due to their tunnel network. It's rather easier for the Navaheim to set up an armory at a tunnel exit where their troops can arm up before going into battle. And, in emergencies, the troops and vehicles can drive into it and travel to other tunnels.

Due to their guerilla training, and miniature illusion generator, all of their unit becomes stealthed when standing still or in cover.