William Henry Johnson was awarded the Medal of Honor in 2015 for fighting off a German raid in hand-to-hand combat, killing multiple German soldiers and rescuing a fellow soldier while experiencing 21 wounds on May 14, 1918.
Milunka Savic enlisted in the Serbian military pretending to be a man. She fought in WWI and was wounded no less than nine times during her service. She also single-handedly captured 23 Bulgarian soldiers.
US Marine John Kelly was the last person to be awarded 2 Medals of Honor. He ran 100 yards in advance of the front line and attacked an enemy machine gun nest, killed the gunner with a grenade, shot another man with his pistol, and returned with 8 prisoners. He was 19.
The youngest soldier in WWI was only 8 years old.
In 1916, Manfred von Richthofen was considered a below average pilot who crashed during his first flight. Despite this poor start, he rapidly became attuned to his aircraft. Upon his death two years, and 80 aerial kills later, the British buried The Red Baron with full military honors out of respect for his skill as an aviator.
The youngest participant in World War I was 8 years old.
During World War 1, Harry Houdini took 1 year off performing to help sell war bonds and teach American soldiers how to escape from German handcuffs.
Prior to World War I, sharpshooter Annie Oakley was touring Europe. By his request, she knocked the ash from a cigarette being held by German Emperor, Kaiser Wilhelm II. When World War I broke out, she wrote to him and requested a second shot.
During World War 1, the United States Government tried to rename hamburgers as “liberty sandwiches” to promote patriotism.