Infantry was made up mostly of men from the Shenandoah Valley and Tidewater areas; the 313th Machine Gun Battalion mostly had men from the Erie, Pennsylvania, area. These units comprised the 159th Infantry Brigade. The 318th Infantry were nicknamed the "squirrels" while training with the British in the Artois/Picardy section of France; the 1st Battalion was the "red squirrels," the 2nd Battalion was the "gray squirrels," and the 3rd Battalion was the "flying squirrels." The 319th Infantry included men from the Allegheny County and Erie areas, and a few from eastern Ohio. The 320th Infantry had men from Pittsburgh; the 315th Machine Gun Battalion had men from Pittsburgh and Erie. These units combined to create the 160th Infantry Brigade. Each infantry regiment in the 80th Division used a unique helmet marking; the 317th used a diamond, the 318th a square, the 319th a circle, and the 320th Infantry Regiment a bowl shape. The headquarters of each regiment divided their shape using three vertical stripes of red, white, and blue; the 1st battalion of each regiment used solid red, the 2nd battalion white, and the 3rd battalion blue. Each company painted their respective letter inside the shape. The machine gun company of each regiment divided their shape vertically in half in red and blue; the supply company divided their shape in red and white. The 313th, 314th and 315th Field Artillery Regiments were composed of men almost exclusively from the state of West Virginia, and formed the 155th Field Artillery Brigade. Serving with the division were the 314th Machine Gun Battalion (men from the Tidewater area) as well as the 305th Engineer Regiment (men from the area east and north of Pittsburgh); the 305th Trains (Ammunition, Engineer, Supply and Sanitary) were men from western Pennsylvania, West Virginia and Virginia. The engineers were more often than not sent out ahead. During the rest period from 14 October through the Armistice, they finally were outfitted with U.S. Springfield and Browning automatic rifles. They had two weeks to train before the third and final push began in the Meuse-Argonne. It was also during this period that an attack formation was reorganized to allow for more maneuverability. Meuse-Argonne The 155th Field Artillery Regiment was in combat from the start of the Meuse Argonne, continuously with the 80th Division, but served also with the 90th Division into Germany, until after the Armistice. Altogether, the 155th served