Ravenstein was selected for a training course in general staff duties and, after completion, joined the General Staff of the Imperial German Army. He soon sought a return to the frontlines and rejoined the 155th Infantry Regiment which was to soon be involved in the third phase of the Spring Offensive. In the Third Battle of the Aisne in May 1918, Ravenstein was given command of his regiment's 1st Battalion and led it through the opposing line. Shortly afterwards, with only a small squad of men, he captured a bridge over the Aisne near Chemin des Dames. Later in the battle, he was in charge of a patrol which executed an ambush of a French battalion, routing it completely. Pushing on with his battalion towards the Marne, his troops eventually took 1,500 prisoners and captured in excess of 30 field guns and machine guns. For his accomplishments, Ravenstein received the Pour le Mérite on 9 June.