Major General Daniel Sickles was a prominent figure in the American Civil War, known for his service in the Union Army. Born on October 20, 1819, in New York City, he became a politician and a soldier. Sickles is best remembered for his controversial decision to move his troops during the Battle of Gettysburg, which ultimately led to significant losses but also showcased his bold leadership. Sickles was the first person to successfully use the legal defense of temporary insanity in a murder trial after he killed his wife’s lover in 1859. He continued to serve in various military roles after the war and was awarded the Medal of Honor for his bravery.