In 1918, Hemingway went overseas to serve in World War I as an ambulance driver in the Italian Army. For his service, he was awarded the Italian Silver Medal of Bravery, but soon sustained injuries that landed him in a hospital in Milan.
There he met a nurse named Agnes von Kurowsky, who soon accepted his proposal of marriage, but later left him for another man. This devastated the young writer but provided fodder for his works "A Very Short Story" and, more famously, A Farewell to Arms.
Still nursing his injury and recovering from the brutalities of war at the young age of 20, he returned to the United States and spent time in northern Michigan before taking a job at the Toronto Star.
It was in Chicago that Hemingway met Hadley Richardson, the woman who would become his first wife. The couple married and quickly moved to Paris, where Hemingway worked as a foreign correspondent for the Star.