[15] The Devil's Disciples gained additional infamy for their assassination attempt on famed French singer-songwriter Johnny Hallyday as well as an internal conflict amongst its members which led to several murders.

The Devil's Disciples were also one of the first Canadian outlaw motorcycle clubs to sport the "1%er" patch on their vests - a trademark of American biker gangs.

During the late 1960s and throughout the 1970s, the Devil's Disciples grew to be one of the most prominent one percenter clubs in Quebec, as the province was considered to be a hotbed for motorcycle gangs during the time.

In 1968, during the beginning of the gang war, Devils Disciples member Clermont Lemire was sentenced to seven years in prison for raping a 20-year-old woman who he had picked up Papineau St. and taken to the club's headquarters on Casgrain St. where the act occurred.

[26] As the conflict went on, police grew frustrated and ordered a sit-down with members of the Popeyes and Devil's Disciples in an effort to put an end to the war between both groups.

They went on to act as security detail for Hallyday at his shows throughout his stay which angered the rivaling Devil's Disciples as they viewed the singer's association with the Popeyes to be a sign of disrespect.

The conflict originated after the Ontario-based Satan's Choice Motorcycle Club branched out into Quebec in 1967, establishing a chapter in Montreal and aligning themselves with the Devil's Disciples, as they were rivals to the Popeyes.

[32][33] On July 21 of the year 1974, two armed assassins entered the Fontaine de Johannie restaurant near St. Louis Square and opened fire on drug pushers Jacques Morin and Jean-Claude Arbour - apparently for stepping on the turf of the Devil's Disciples MC.

[33] The internal conflict started when Claude Ellefsen and high-ranking Devils Disciples member Gilles Forget agreed to build a meth lab together to produce product for the gang's revenue.

[33] Drug-dealing member Claude Brabant who had recently defected from Ellefsen's side to join the Forget faction, was discovered dead in a rural highway on April 26, 1975.

[33] On April 29, a number of Devils Disciples members who were aligned to Gilles Forget shot and killed Ellefsen's bodyguard Jean-Pierre Aspirot in retaliation.

A homemade bomb containing six sticks of dynamite and 32 ounces of nitroglycerin is also discovered that same day by kids at the home of Jose Martindale, Ellefsen's top associate.

[33] On May 28 of the same year, an assassination attempt in the form of a spray of bullets occurs at the home of Guy Fillion, a loan shark, drug dealer and the partner of Claude Ellefsen.

On July 20, Joseph Minotti (a Devil's Disciple who belonged to Forget's faction) was gunned down in a drive-by shooting with his friends Richard Boucher and Daniel Lafortune sustaining minor injuries from the gunfire.

[35] The Devils Disciples eventually faced stiff competition from the Dubois Brothers (also allied with the Popeyes MC) who ended up taking over a large portion of their territory.

In 1994, he, along with other ex-Devil's Disciples, founded the so-called "Dark Circle", a crime ring that consisted of a group of outwardly respectable Montreal businessmen who were secretly engaging in drug trafficking.

[37] In August 1983, onetime Devil's Disciples leader and Montreal underworld figure Guy Filion was shot dead while at his brother's restaurant located in St. Hubert, Quebec.