Which abolitionist movement involved a term that came to prominence just before the American Civil War in Bleeding Kansas?
Jayhawker
Title: Lane County, Kansas
Passage: Lane County (standard abbreviation: LE) is a county located in the U.S. state of Kansas.  As of the 2010 census, the county population was 2,150, making it the third-least populous county in Kansas.  The county seat is Dighton, the only city in the county.  The county was named after James H. Lane who was a leader of the Jayhawker abolitionist movement and served as one of the first U.S. Senators from Kansas.
Title: Jayhawker
Passage: Jayhawkers is a term that came to prominence just before the American Civil War in Bleeding Kansas, where it was adopted by militant bands affiliated with the free-state cause.  These bands, known as "Jayhawkers", were guerrilla fighters who often clashed with pro-slavery groups from Missouri known at the time as "Border Ruffians".  After the Civil War, the word "Jayhawker" became synonymous with the people of Kansas.  Today a modified version of the term, Jayhawk, is used as a nickname for a native-born Kansan, but more typically for a student, fan, or alumnus of the University of Kansas.
Title: Pottawatomie massacre
Passage: The Pottawatomie massacre occurred during the night of May 24 and the morning of May 25, 1856.  In reaction to the sacking of Lawrence, Kansas by pro-slavery forces, John Brown and a band of abolitionist settlers—some of them members of the Pottawatomie Rifles—killed five settlers north of Pottawatomie Creek in Franklin County, Kansas.  This was one of the many bloody episodes in Kansas preceding the American Civil War, which came to be known collectively as Bleeding Kansas.  Bleeding Kansas was largely brought about by the Missouri Compromise and the Kansas–Nebraska Act.
Jayhawker Lane County, Kansas