World War I Medal of Honor Recipient. He received the award from US Army General John J. Pershing at Chaumont, France on February 9, 1919 for his actions as a private with Company M, 167th Infantry, 42nd Infantry Division, US Army, on October 16, 1918, near Landres-Et-St. Georges, France. He enlisted in the Idaho National Guard just prior to the US entry into World War I in April 1917. At the end of the year, he was deployed to France as part of the replacement for the American Expeditionary Force. He saw combat action at the Third Battle of the Aisne and the Second Battle of the Marne, during which time he was temporarily incapacitated by German mustard gas. In late September 1918 the American forces launched the Meuse-Argonne Offensive and on that day, his gallantry above the call of duty won him the Medal of Honor. He was also the recipient of the Purple Heart, the World War I Victory Medal, the French Legion d'Honneur (Chevalier) and Croix de Guerre, the Italian War Merit Cross, and the Montenegro Silver Medal for Military Bravery. Following the war, he returned home and fell on hard times, with the death of three of his children from accidents and severely injuring his arm in an industrial accident. He died of tuberculosis at the age of 44. His Medal of Honor citation reads: "On the afternoon of 16 October 1918, when the Cote-de-Chatillion had just been gained after bitter fighting and the summit of the strong bulwark in the Kriemhilde Stellung was being organized, Pvt. Neibaur was sent out on patrol with his automatic rifle squad to enfilade enemy machine-gun nests. As he gained the ridge, he set up his automatic rifle and was directly thereafter wounded in both legs by fire from a hostile machine gun on his flank. The advance wave of the enemy troops, counterattacking, had about gained the ridge, and although practically cut off and surrounded, the remainder of his detachment being killed or wounded, this gallant soldier kept his automatic rifle in operation to such effect that by his own efforts and by fire from the skirmish line of his company, at least 100 yards in his rear, the attack was checked. The enemy wave being halted and lying prone, four of the enemy attacked Pvt. Neibaur at close quarters. These he killed. He then moved alone among the enemy lying on the ground about him, in the midst of the fire from his own lines, and by coolness and gallantry captured 11 prisoners at the point of his pistol and, although painfully wounded, brought them back to our lines. The counterattack in full force was arrested to a large extent by the single efforts of this soldier, whose heroic exploits took place against the skyline in full view of his entire battalion."