Who was Sgt. Henry Nicholas Gunther?

Sgt Henry N. Gunther was the last soldier to be killed in WW1.

Sergeant Henry Nicholas John Gunther was an American soldier serving in France during the First World War. He was killed in action at 10:59am on November 11, 1918, just one minute before the Armistice ending the war took effect, by a burst of machine gun fire as he walked towards a German roadblock in the village of Chaumont-devant-Damvillers, and is believed to be the very last of the 15-20 million soldiers to have been killed during the war.

Gunther's unit, Company 'A', arrived at the Western Front on September 12, 1918. Like all Allied units on the front of the Meuse-Argonne Offensive, it was still embroiled in fighting on the morning of November 11. The Armistice with Germany was signed by 5:00 a.m., local time, but it would not come into force until 11:00 a.m. Gunther's squad approached a roadblock of two German machine guns in the village of Chaumont-devant-Damvillers near Meuse, in Lorraine. Gunther got up, against the orders of his close friend and now sergeant, Ernest Powell, and charged with his bayonet. The German soldiers, already aware of the Armistice that would take effect in one minute, tried to wave Gunther away. He kept going and fired "a shot or two". When he got too close to the machine guns, he was shot in a short burst of automatic fire and killed instantly.

https://en.wikipedia.org/wiki/Henry_Gunther