The “Did You Know?” series is a recurring blog about interesting facts involving the U.S. military and its many components. The purpose is to enlighten and entertain readers with information not readily known.

The youngest U.S. serviceman was 12-year-old Calvin Graham, US Navy. He was wounded and given a Dishonorable Discharge for lying about his age. (His benefits were later restored by act of Congress.)

During World War II the Germans considered the classic film Casablanca starring Humphrey Bogart to be a propaganda film and refused its showing in German cinemas. Even after the war, the film was censored in Germany—unless all references to Nazis had been edited out.

U.S. General George Custer always slept with his dog on his bed.

By the end of the American Civil War between a third and a half of all money in circulation in the United States was counterfeit.