The rebel yell was the distinctive battle cry of Confederate troops during the American Civil War in the 1860s, described by witnesses as a high, yelping shout rather than a deep cheer. Recordings of elderly veterans made in the early twentieth century helped preserve its strange, wavering sound for later generations. It later entered films, documentaries, and reenactments about the war, and from there it spread online as a short, dramatic sound effect for history videos, memes, and edits about rebellion, charging into battle, or standing against overwhelming odds.