Complex sentence: The Harlan County War was a violent labor dispute between organizing coal miners and strikebreakers in Harlan County, Kentucky from 1931 to 1932, origin of the county's nickname of "Bloody Harlan".
Split into simpler sentences: The Harlan County War was a violent labor dispute between organizing coal miners and strikebreakers in Harlan County, Kentucky from 1931 to 1932. It was the origin of the county's nickname: "Bloody Harlan".