Third Infantry Brigade: Ninth Infantry. Twenty-third Infantry. Fifth Machine Gun Battalion. Fourth Infantry Brigade: Fifth Marines. Sixth Marines. Sixth Machine Gun Battalion of Marines. Second Field Artillery Brigade: Twelfth Field Artillery. Fifteenth Field Artillery. Seventeenth Field Artillery. Second Trench Mortar Battery. Other troops: Second Engineers. Fourth Machine Gun Battalion. First Field Signal Battalion. Second Headquarters Train and Military Police. Second Ammunition Train. Second Engineer Train. Second Supply Train. Second Sanitary Train. On October 26, 1917, Brig. Gen. Charles A. Doyen, United States Marine Corps, assumed command of the Second Division as its first commanding general and announced his staff in General Orders, No. 1, with station at Bourmont, Haute-Marne, France. Lieut. Col. Logan Feland, United States Marine Corps, was the first chief of staff. On November 8, 1917, Maj. Gen. Omar Bundy, United States Army, assumed command, published such fact in General Orders, No. 4, November 8, 1917, and was in command of it during the operations in the Verdun and Chateau-Thierry sectors. Maj. Gen. James G. Harbord, United States Army, commanded the division in the Aisne-Marne (Soissons) offensive in July, 1918. Maj. Gen. John A. Lejeune assumed command of the division on July 28, 1918, and retained command until its demobilization in August, 1919. Many Marine officers occupied positions of importance and responsibility on the staff of the commanding general, Second Division. A Marine officer commanded the Seventeenth Field Artillery during the Meuse-Argonne offensive, and other Marine officers commanded battalions of the Ninth Infantry and Fifteenth Field Artillery for a time. Neither the Marine Brigade nor any other element of the Second Division was the first American unit to enter the front lines since the First Division enjoyed that honor in October, 1917, when it entered the line in the quiet Toul sector.