Popularly known as the "Twilight Division." Insignia, black triangle with white tips on a red circle on a khaki ground. Organized at Camp Dodge, Iowa, September 1, 1918. The 2d and 14th Regular Army Infantry Regiments were assigned to this division and these regiments furnished the nucleus for the organization of the other two-infantry regiments of the division. The artillery brigade of the division was organized at Camp Bowie, Texas, on August 14, 1918, from the 307th and 309th National Army Cavalry Regiments. In the early part of October the artillery brigade was ordered to Fort Sill, Okla., for training at the Field Artillery Brigade Firing Center. The brigade never actually joined the division at Camp Bowie. The engineer regiment was organized at Camp Humphreys, Va., on September 26, 1918. It remained in training at Camp Humphreys until the first of November when it joined the division at Camp Dodge. All other units of the division were organized and undergoing intensive training by the end of October and at the time of the signing of the armistice, the division was being rounded into shape for service overseas. Demobilization of the division was commenced on January 23, 1919, and all organizations not belonging to the Regular Army were demobilized by January 29, 1919.

Commanders of division: Col. W. C. Bennett, September 1, 1918 to September 26, 1918; Col. Armand I. Lasseigne, September 26 to Oct. 25, 1918; Brig. Gen. Benjamin T. Simmons, Oct. 25, 1918, until demobilization.

This division was composed of the following organizations: 19th Hqs. Troop, 55th Machine Gun Bn., 37th Inf. Brig., (14th and 87th Inf., 56th Machine Gun Bn.), 38th Inf. Brig. (2nd and 88th Inf., 57th Machine Gun Bn.), 19th Fld. Arty. Brig. (55th, 56th and 57th Fld. Arty.), 19th Trench Mortar Battery, 219th Engr. Regt. And Train, 19th Train Hqs. And M.P., 19th Supply Train, 19th Amm. Train, 19th Sanitary Train (Field Hospitals and Amb. Cos. Nos. 273, 274, 275 and 276).