Home base: Australia
Criminal activities: Firearms, drugs (transportation and distribution), counterfeiting, tax evasion, extortion, money laundering, trafficking stolen goods
Reputed to be Australia's largest biker gang -- with 2,000 members and a full 70 chapters nationwide -- the Rebels have been tied to a variety of execution-style killings in the last decade, including the murder of three members of their Aussie rival, the Bandidos. The only problem with Australian biker gangs is that they're referred to as "Bikie" gangs, a term that, at least in the U.S., seems to seriously undercut street credibility.