William Quantrill

William Clarke Quantrill (July 31, 1837 – June 6, 1865) was a Confederate guerrilla leader during the American Civil War.

Quantrill experienced a turbulent childhood, became a schoolteacher, and joined a group of bandits who roamed the Missouri and Kansas countryside to apprehend escaped slaves. The group became irregular pro-Confederate soldiers called Quantrill's Raiders, a partisan ranger outfit best known for its often brutal guerrilla tactics in defense of the Confederacy, and included the young Jesse James and his older brother Frank James.

Quantrill was influential to many bandits, outlaws, and hired guns of the American frontier as it was being settled. On August 21, 1863, Quantrill's Raiders committed the Lawrence Massacre. In May 1865, Quantrill was mortally wounded in combat by U.S. troops in Central Kentucky in one of the last engagements of the American Civil War. He died of his wounds in June 1865.