SGT James B. Aets uses a quadrant to determine the elevation of the 155mm Howitzer, while CPL Charles J. Hines sights on the aiming stake. Circa 1914 to 1918. Photo courtesy the National
SGT James B. Aets uses a quadrant to determine the elevation of the 155mm Howitzer, while CPL Charles J. Hines sights on the aiming stake. Circa 1914 to 1918. Photo courtesy the National Archives