Question: Harry 'The Hunchback' Riccobene became a major figure in the gang war that followed the death of a mobster who had a preference for conciliation over what?

Context paragraphs:
Gang War: Gang War (released as All Square in the UK) is a 1928 part-talking gangster film, best known for being the main feature attached to "Steamboat Willie", the debut of Mickey Mouse in sound.  The film starred Jack Pickford in his last major role, as "Clyde", a saxophone player whose love for a dancer named Flowers (Olive Borden) traps him in the middle of a gang war.  The film was released with talking sequences, as well as a musical score and sound effects for the silent sections.  But despite the synchronised sound as well as the all-star cast, the film is largely unknown in its own right and is now a lost film, being overshadowed by its far more famous preceding short.

Angelo Bruno: Angelo "The Gentle Don" Bruno (born Angelo Annaloro; May 21, 1910 – March 21, 1980) was a Sicilian-American mobster, notable for being boss of the Philadelphia crime family for two decades until his assassination.  Bruno gained his nickname and reputation as "the Gentle Don" or "the Docile Don" due to his preference for conciliation over violence, especially in comparison to his violent successors.

Ahmed Janka Nabay: Ahmed Janka Nabay is a Sierra Leonean musician who has been a major figure in Bubu Music, a traditionally Muslim music which is played by up to 20 musicians blowing into bamboo pipes of different sizes.  Janka Nabay recorded his album in Forensic Studios in Freetown during the Sierra Leonean Civil War.  Since moving to Washington, D.C. in 2003, Janka Nabay has continued to play bubu music, including a performance at the CMJ College Music Marathon in New York in 2009 and 2010.  In June 2010, he formed a full band, Janka Nabay and the Bubu Gang, with members of four Brooklyn indie rock groups Skeletons, Gang Gang Dance, and Starring.  In 2012, Janka's band announced that they had signed a three-album record deal with David Byrne's record label, Luaka Bop.

Samuel Weiss (mobster): Samuel "Sammy" Weiss (c. 1904 – ?)  was a New York mobster and an associate of labor racketeer Jacob "Little Augie" Orgen.  Employed as a gunman for Orgen and the "Little Augies", he took part in the gang war against Nathan Kaplan during the early 1920s.  On the afternoon of August 28, 1923, several men were spotted by police shortly before Kaplan was to leave the Essex Market Courthouse (he would be killed later that day by Orgen gunman Louis Cohen).  Although the men scattered as police officers approached, Weiss, Orgen and Samuel Gepson were arrested near the courthouse.  Finding all three men to be carrying revolvers, the three were arrested and charged with violation of the Sullivan Law and arraigned at Essex Market Courthouse the following day.

Harry Riccobene: Harry 'The Hunchback' Riccobene (July 27, 1909 – June 19, 2000) was a high-ranking member of the Philadelphia crime family who became a major figure in the short, but violent, gang war that followed the 1980 death of boss Angelo Bruno.

Harry Owen (rugby league, Widnes): Harry 'Ginger' Owen (birth registered during January→March 1907 — death registered during January→March 1966) birth registered in Prescot district, was an English was a chemical worker and professional rugby league footballer who played in the 1920s, 1930s, and 1940s, playing at club level for Widnes, as a wing , i.e. number 2 or 5, his death was registered in Prescot district.

Tom Devaney: Tom Devaney (d. July 20, 1976) was a New York mobster and an enforcer to Mickey Spillane during the 1960s and 70s.  As Spillane's chief lieutenant, Devaney played a leading role in the growing animosity between Spillane and the Genovese crime family as well as the gang war against James Coonan.

Danny Greene: Daniel John Patrick "Danny" Greene (November 14, 1933 – October 6, 1977) was an Irish American mobster and associate of Cleveland mobster John Nardi during the gang war for the city's criminal operations during the 1970s.  Competing gangsters set off more than 35 bombs, most attached to cars in murder attempts, many successful.  Greene had gained power first in a local chapter of the International Longshoremen's Association, where he was elected president in the early 1960s.  Greene pushed into Cleveland rackets and began competing with the Italian-American Mafia for control of the city.  He set up his own group called the Celtic Club, complete with enforcers.

Ida Burger: Ida Burger, known in the underworld of New York as Ida The Goose, was a popular dance hall girl and a prostitute during the turn of the century.  She was the subject of a major gang war between members of the Gopher Gang and saloonkeeper Chick Tricker's faction of the Eastman Gang.

Frank Monte: Frank Monte (June 21, 1931 in South Philadelphia – May 13, 1982 in South Philadelphia) was a member of the Philadelphia crime family.  When Nicodemo Scarfo became boss, he named Monte as his consigliere.  When Harry Riccobene refused to accept Scarfo as boss, the "Riccobene War" ensued.  In 1979 Testa, Salvatore (Chuckie) Merlino and Robert (Bobby) Lumio murdered 31-year-old drug dealer Michael (Coco) Cifelli.  He was murdered for selling drugs to the son of Frank Monte, a capo from Cinnaminson Township, New Jersey.  Frank served under Phil Testa and later Nicky Scarfo.  He oversaw illegal gambling operations in Atlantic City and New Jersey for the crime family.  Michael Cifelli was gunned down by Testa and Salvatore (Chuckie) Merlino as he was talking on the phone in a telephone booth just inside a bar, Priori's, at 10th and Wolf Streets in the Point Breeze neighborhood of Philadelphia.  Monte was later promoted to be consigliere in 1981 by Nicky Scarfo.  Monte was murdered by a sniper rifle in 1982 on the orders of Riccobene.  When the killers were arrested, they agreed to cooperate with law enforcement for lighter prison sentences.  The men testified for the prosecution that Riccobene ordered them to kill Monte.  Riccobene was convicted of the murder on 1984 and sentenced to life in prison.

Supporting paragraphs: Harry Riccobene Angelo Bruno
Answer: violence