On October 16, 1918, the American attacks captured Còte de Châtillon, though there remained several pockets of German units and many isolated machine gun positions. Neibaur along with two other soldiers, an observer and a loader, volunteered to flank and remove a network of machine guns just over a hundred yards from "M" Company and 3rd Battalion's hastily occupied positions. Crawling up a draw between two spurs, Neibaur's automatic rifle team encountered a wire obstacle and was then fired upon. Neibaur's two team members were killed and he received three wounds in the right thigh. Passing through the wire entanglements he positioned his automatic rifle behind a dirt berm. Some Germans observed his movement and approximately 50 or so attacked him. He opened fire with his Chauchat automatic rifle, killing or wounding most of them until his gun jammed, firing some 50 rounds or two and a half clips.