September 7 - Jerry O'Connor , a member of the Southside O'Donnell's , is killed by Frank McErlane in a driveby shooting. This is the first time a Thompson submachine gun popularly known as a "Tommy gun" is used.
September 17 - George Meeghan , a Chicago bootlegger allied with the Southside O'Donnell's, and Southside O'Donnell member George Bucher are killed by Frank McErlane.
November 1 - William Lovett is killed by three Black Hand assassins led by Dui Cutetti .
December 1 - Thomas Keane , a beer-runner for the Southside O'Donnell's, is killed by rival gang leader Frank McErlane during a hijack attempt.