The Collingwood Manor Massacre Killing , is the name Name_conferral that was given Giving to a notorious hit put out on three Chicago gunmen by the notorious Purple Gang on September 16 , 1931 .

The Purple Gang 's name rang Vocalizations on Detroit 's streets and they also ruled Control the underworld .

The day began Process_start with an Irish Republican Army ( IRA ) operation , organised Arranging by Michael Collins , to assassinate Attack the 'Cairo Gang ' – a team of undercover British intelligence agents working Employment and living Placing in Dublin .

In a part of the operation ( known later as the Battle of Gang Toi ) , 1RAR attacked Attack a VC bunker and trench system .