World War I
During the Great War, the 9th Infantry Regiment was assigned to the 2nd Division, which consisted of one Army and one Marine brigade. Under command of 3rd Brigade, the Manchus occupied a section of the Verdun Sector of France where it underwent the final phase of training under the eyes of the French Army. The regiment next moved to the Soissons Sector of France where is participated in the Battle of Belleau Wood and the Battle of Chateau Thierrey in June and July 1918. During the Battle of St. Mihel on 12-15 September, the 9th Infantry distinguished itself against their German foes, capturing over 1600 prisoners and 76 pieces of artillery. After a brief rest, the 2nd Division transferred to the command of the Fourth French Army and took up positions in the Champagne Sector. From 03 October to 09 October, the Regiment participated in the Battle of Mont Blanc and helped expel the German Imperial Army from the region. On 22 October the division was transferred back to the First American Army and fought in the MeuseArgonne Campaign from 01 November to 11 November when the armistice took hold. For its actions during World War I, the 9th Infantry earned the Aisne, Aisne-Marne, St. Mihel, MeuseArgonne, Ile de France 1918, and Lorraine 1918 campaign streamers as well as three French Croix de Guerre with Palm and Fourragere.