On Fathers Day, the 2nd September R 1984, there was a shoot out between two rival motorcycle gangs at a British motorcycle swap meet in the Western Sydney suburb of Milperra. The shoot out had its origin in a bitter split within the Comancheros and Bandidos motorcycle or bikie gangs. At the end of the shoot out seven people were dead,including a 15 year old girl who was just standing by.

Check out the 60 Minutes documentary on the massacre – done in 2014 on the 30th anniversary

https://www.youtube.com/watch?v=4nFKnEwU4MI