 In June, more American divisions entered the front lines and Neibaur fought in several campaigns, the Aisne, the Aisen-Marne, and the Champagne-Marne through August 1918.As with any infantry regiment, brigade or division, the units rotated and relieved one another on a routine basis.During this time, Neibaur was wounded or incapacitated temporarily by German mustard gas.