The story of the Milperra massacre, when the bikie clubs the Bandidos and Camoncheros went to war on Father's Day in suburban Sydney.

Brothers in Arms is the story of the lead-up to, reasons for, and repercussions of the "Milperra Massacre" where two warring Motorcycle Clubs faced off in the car park of a western Sydney pub on Father's Day, 1984. The two clubs, the Bandidos, and the Comancheros, were once under one club, only to later split, which then caused a rift that would lead to many deaths. While the show is "based" on real events, there are inaccuracies that can easily be ignored and give the viewer an insight into not only the bikie (biker) culture, but also one of the worst massacres in Australian history.—jeffhore

The series tells the true story of the Milperra massacre, when the Bandidos and the Comancheros motorcycle clubs went to war on Father's Day, Sunday 2 September 1984. The massacre had its beginnings after a group of Comancheros broke away and formed the first Bandidos Motorcycle Club chapter in Australia. This resulted in intense rivalry between the two chapters. At a public swap meet at the Viking Hotel at Milperra, a brief but violent battle ensued with seven people shot dead, including a 14-year-old innocent bystander. A further 28 people were wounded, with 20 requiring hospitalisation.

On September 2, Father's Day 1984, two motorcycle clubs went to war at a public swap meet. After a brief but violent battle, seven people had been shot dead, including a young innocent bystander, and some 40 other club members needed hospitalisation. Brothers in Arms is the story of how that day came to pass. Based on the bestselling book Brothers in Arms by Sandra Harvey and Lindsay Simpson.