Jayhawkers and red legs are terms that came to prominence in Kansas Territory, during the Bleeding Kansas period of the 1850s; they were adopted by militant bands affiliated with the free-state cause during the American Civil War. These gangs were guerrillas who often clashed with pro-slavery groups from Missouri, known at the time in Kansas Territory as "Border Ruffians." After the Civil War, the word "Jayhawker" became synonymous with the people of Kansas, or anybody born in 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.
The Jayhawkers! is a 1959 American Technicolor VistaVision film directed by Melvin Frank, starring Jeff Chandler as Luke Darcy and Fess Parker as Cam Bleeker. The film is set in pre-Civil War Kansas. Darcy leads a gang which seeks to take advantage of Bleeding Kansas (loosely based on abolitionist John Brown; Bleeker joins the gang. The supporting cast features Henry Silva and Leo Gordon.
The Raytheon T-1 Jayhawk is a twin-engined jet aircraft used by the United States Air Force for advanced pilot training. T-1A students go on to fly airlift and tanker aircraft. The T-400 is a similar version for the Japan Air Self-Defense Force.
The Kansas Jayhawk Community College Conference is a college athletic conference that is a member of the National Junior College Athletic Association. As of 2007, the KJCCC was home to more than 3,000 student-athletes in the 19 men's and women's sports.