Question: What was the pro-slavery group called that Silas Soule clashed with?
Context: Sergio Emilio Charles Garduño (October 12, 1956 – December 28, 2012) was a Mexican Luchador or professional wrestler who is best known under his Ring name Emilio Charles Jr.  He is the son of professional wrestler Emilio Charles.  Over the years Emilio Charles Jr. has worked for virtually all major Mexican professional wrestling promotions including Consejo Mundial de Lucha Libre (CMLL), Asistencia Asesoría y Administración (AAA) and International Wrestling Revolution Group (IWRG).  He is also one of the founding members of the wrestling group called "Los Destructores" (“the Destroyers”) along with Vulcano and Tony Arce.  He was also a key member in the group "Los Guapos" (“the Handsome Ones”) as well as a group called "Los Talibanes" (the Taliban), both with longtime wrestling partners and friends Scorpio Jr. and Bestia Salvaje. Gabriel Gatwech Chan (better known by his nickname Gabriel Tang or Gabriel Tang Ginye; 1960–4 January 2017) was a rebel militia leader in South Sudan.  General Tang led a southern border militia allied to the Khartoum government during Sudan's civil war.  Most of his fighters are of the Nuer ethnic group.  Members of the Sudanese armed forces loyal to Gen Tang in Malakal clashed with the Sudan People's Liberation Army (SPLA) in 2006, killing about 150 people, and in 2009 in breach of the peace deal.  In April 2011, clashes between his militia and the SPLA in the state of Jonglei killed at least 57 according to government officials.  Shortly thereafter, Tanginye surrendered to SPLA forces and had been under house arrest in Juba awaiting charges against him.  During the South Sudanese Civil War, he allied with Lam Akol's militia, a Juba linked rebel group called the National Democratic Movement and became its chief of staff.  In January 2017 he was killed in a clash with a group led by John Uliny from the main rival rebel group, the SPLM-IO.  In these clashes in the Hamra area in the northern Upper Nile, 20 others were killed. Silas Stillman Soule (July 26, 1838 – April 23, 1865) was an American abolitionist, Kansas Territory Jayhawker, anti-slavery militant, and a friend of John Brown and Walt Whitman.  Later, during the American Civil War, he joined the Colorado volunteers, rising to the rank of Captain in the Union Army. OlaDotun Ojuolape Kayode (born April 8, 1984) popularly known as DO2dTUN (pronounced "D-O-to-the-T-U-N") is a Nigerian-based media mogul, on-air personality, disk jockey, video jockey, voice-over artist, sound engineer, hype-man, voice coach and entertainment entrepreneur.  He started out his sojourn in the entertainment industry when he as an undergraduate student of the Lagos State University pioneered a dance group called Xtreme Dancers.  The group later became defunct and then he joined popular choreographer Nonso (known as Flexxx) on a dance group called IGNITE.  He pursued a career in broadcasting in 2004 when he joined Cool FM where he served as an intern for about five years before he began to host radio shows.  He has received numerous awards, including Broadcaster of the Year at the Dynamix All Youth Awards (2011), Young Radio Presenter of the Year at the 2012 Nigeria Broadcasters Merit Award, Radio Personality of the Year at The Society Awards (2011), On Air Personality of the Year at the 2015 City People Awards, and On Air Personality of the Year at the 2015 edition of the Nigerian Entertainment Awards.  He was also nominated as the Broadcaster of the year at the 2011 and 2012 editions of The Future Awards. Vistoso Bosses were an American R&B duo made up of Taylah P. and Kelci from Atlanta, Georgia.  They debuted with the single "Delirious" produced by STJAMES, features Soulja Boy Tell 'Em, taken from their 2009 shelved album "Confetti".  They are also the first ladies signed to the Collipark Label, founded by Mr. Collipark aka Michael Crooms.  They also are featured on Space Cowboy's new album: the song Party Like Animal.  The duo split up in late 2010.  Kelci was featured with another all-girl group called "We Are Gauge" from the Most Talented School In America on YouTube.  Kelci is officially in an all-girl group called "We Are Levi". The Immortal Ten were a group of militant Kansan abolitionists and Free-Staters who on July 23, 1859, freed John Doy from a Missouri jail, where he was being held for allegedly abducting slaves.  The group included George R. Hay, Silas Soule, Charles Doy, Capt. John E. Stuart [Stewart], S. J. Willis, Thomas Simmons, Joseph Gardner, Jacob Senix, Capt. Joshua A. Pike and Major James B. Abbott. Esteban Mares Castañeda (born September 3, 1952) is a Mexican "luchador", or professional wrestler, better known by the ring name Black Terry.  Wrestling since 1973, he was once part of a group called "Los Temerarios" alongside Jose Luis Feliciano and Shu El Guerrero.  He has previously worked as the masked character Guerrero Maya ("Mayan Warrior") where he formed the group called "Los Guerreros Del Futuro" ("The Warriors of the Future") with Guerrero del Futuro (a masked Feliciano) and Damian El Guerrero.  He is the father of wrestler Guerrero Maya, Jr. although the relationship is not officially recognized due to Guerrero Maya, Jr. being a masked wrestler. The Ghuraba al-Sham Front (Arabic: جبهة غرباء الشام‎ ‎ "Jabhat Ghurabā’ ash-Shām", "Strangers/Foreigners of the Levant") was a group of fighters, active during the Syrian civil war, in favor of a non-religious state.  The group formerly had around 2,000 men, but in May 2013 it clashed with Islamic fundamentalist groups and most of its fighters dispersed.  Ghuraba al-Sham's arsenals were confiscated by the Islamists and by late 2013 it had only has around 100 fighters in its ranks.  The group consisted of a mixture of secularists and Islamists.  The name of the group has since changed.  There was a battalion within the group called the Loyalty Battalion made up entirely of women. Rafael Núñez Juan (born October 11, 1966) is a Mexican "Luchador" or professional wrestler who is best known under his Ring name Scorpio Jr.  Núñez is the son of professional wrestler "Scorpio" and was trained by his father and Rafael Salamanca before making his debut on August 30, 1985.  Núñez was originally an "Enmascarado", masked wrestler, but lost his mask as a result of a loss to the team of Negro Casas and El Hijo del Santo on March 19, 1999 Over the years Scopio Jr. has worked for virtually all major Mexican professional wrestling promotions including Consejo Mundial de Lucha Libre (CMLL), Asistencia Asesoría y Administración (AAA) and International Wrestling Revolution Group (IWRG).  He is also one of the founding members of the wrestling group called "Los Guapos" (the Hansomes) as well as a group called "Los Talibanes" (the Taliban), both with longtime wrestling partners and friends Emilio Charles Jr. and Bestia Salvaje. 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.
Answer: "Border Ruffians"