"Worker housing," explains Captain Noda, pointing to the big area with his swagger stick. "Military barracks," he says, pointing to the small area. Bending closer, Goto Dengo can see that the larger, worker area is to be surrounded by an irregular polygon of barbed wire. Actually, two polygons, one nested within the other, a barren space in between. The vertices of this polygon are labeled with the names of weapons: Nambu, Nambu, Model 89 field mortar.