Iron Mike is the de facto name of various monuments commemorating servicemen of the United States military. The term "Iron Mike" is uniquely American slang used to refer to men who are especially tough, brave, and inspiring; it was originally a nautical term for a gyrocompass, used to keep a ship on an unwavering course.[1][2][3] Because the use of the slang term was popular in the first half of the 20th century, many statues from that period acquired the Iron Mike nickname, and over the generations the artists' titles were largely forgotten. Even official military publications and classroom texts tend to prefer the nickname to the original titles.