In April 1917, the United States entered World War I and shortly afterwards, Scott, then 19 years old, joined the United States Army. He served in France as an artillery observer with the 2nd Trench Mortar Battalion, 19th Field Artillery. His wartime experience would give him training that would be put to use in his later film career, including horsemanship and the use of firearms.
Post World War I career. After the Armistice brought World War I to an end, Scott stayed in France and enrolled in an artillery officers' school. Although he eventually received a commission, Scott decided to return to America and thus journeyed home around 1919...
According to the New York Times: "He enlisted in World War I by lying about his age."
...Shortly after the United States entered World War II, Scott attempted to obtain an officer's commission in the Marines, but because of a back injury years earlier, he was rejected. However, he did his part for the war effort by touring in a comedy act with Joe DeRita (who later became a member of the Three Stooges) for the Victory Committee showcases, and he also raised food for the government on a ranch that he owned.
Mr. Scott, we thank you for your service and your willingness to serve. Rest in peace.