In case anyone thinks the Bandidos are a social club.
But the past three decades have been shot through with sporadic bike gang battles, often overseas. By the 1980s, both the Bandidos and the Hells Angels had become international organizations. In 1984, a shootout between Bandidos and another gang called the Comancheros killed seven and wounded 28 in Milperra, Australia, near Sydney. The incident became known as the Milperra Massacre.
In the mid-1990s, a Great Nordic Biker War between the Bandidos and the Hells Angels shook Scandinavia. At least 12 people died and nearly 100 were injured in the three-year skirmish, which featured unprecedented firepower for a gangland rivalry. These hostilities have involved military [ordnance] as well as automatic weapons, Quinn writes. At one point the Angels launched a grenade at a jail holding an enemy leader.
The two bike gangs faced off again in Canada during the late 1990s and 2000s. This time, the conflict dubbed The Quebec Biker war reportedly cost 150 lives. The conflict largely ended in April 2006, when authorities found eight Bandidos members dead in a farmers field near Toronto. In 2009, an ex-cop on trial for the assassinations accused Bandidos world president Jeff Pike of ordering the killings. The ex-cop and five others were convicted of the crime. Pike denied the accusation and was never charged.
http://www.washingtonpost.com/news/morning-mix/wp/2015/05/18/how-the-bandidos-became-americas-most-feared-biker-gang/