The regiment was engaged in the battle of the Marne to cover the pocket of Château-Thierry. In three days of combat in the Soissonnais, the battalions contributed 40 hours of march out of which 30 in combat. The regiment was accordingly sent to Picardie and was successful at Montdidier. In August 1918, making way back to Soissons, the regiment participated within the cadre and corps of the 10e Armée to the counter-attack of Mangin. While clearing Soissons, the three battalions adopted Vauxaillon as a marching axe and pushed back towards Chemin des Dames. From October to November 1918, the regiment was seen ending campaign in la Lys in Belgium.