On the Peculiarities of General Dan Sickles: If there was ever an American Civil War General who led an extraordinary life not named Robert E. Lee or Ulysses S. Grant, it was Daniel E. Sickles. For starters, he lived to the age of 94, having been born in 1819 in New York City, and later dying there in 1914. Prior to the Civil War, Sickles worked as a lawyer and served as a legislator in the New York State Assembly. He married a woman who was half his age in the early 1850s, and by 1857, he was elected to serve in the U.S. Congress as a Representative from New York. While in Washington D.C., his young wife (who was only about 20 at the time) had taken up an affair with the local district attorney (who also happened to be Francis Scott Key's son). Upon learning of his wife's infidelity, Sickles proceeded to shoot and kill Philip Barton Key II. At the trial, Sickles pleaded "temporary insanity" and was actually acquitted of murder. His plea is often considered the first use of an "insanity" defense in the history of American jurisprudence. But aside from Sickles' legal issues, he is perhaps best known as the General who lost his leg during the Battle of Gettysburg in 1863. Although the cannonball that tore through his leg effectively ended his military career, Sickles was happy to donate both the cannonball and his amputated leg to the newly formed Army Medical Museum. And on every anniversary of the amputation, Sickles visited the display that contained his shattered leg.