American Civil War: <a href="https://en.wikipedia.org/wiki/Battle_of_Nashville" id="mwrg" rel="mw:WikiLink" title="Battle of Nashville">Battle of Nashville</a>: The Union's <a href="https://en.wikipedia.org/wiki/Army_of_the_Cumberland" id="mwrw" rel="mw:WikiLink" title="Army of the Cumberland">Army of the Cumberland</a> routs and destroys the Confederacy's <a href="https://en.wikipedia.org/wiki/Army_of_Tennessee" id="mwsA" rel="mw:WikiLink" title="Army of Tennessee">Army of Tennessee</a>, ending its effectiveness as a combat unit.