The gang maintained an uneasy truce with the other rival gangs, until 1923, when a brief gang war broke out between the Sheldon Gang and the Southside O'Donnells until O'Donnell leader Edward O'Donnell was forced to leave Chicago after being severely wounded, by Frank McErlane, during a drive-by shooting on September 25, 1925.
The gang had an uneasy peace with other rival gangs until 1923, when a brief gang war began between the Sheldon Gang and the Southside O'Donnells. The conflict concluded after O'Donnell leader Edward O'Donnell was forced to leave Chicago due to injuries sustained in a drive-by shooting on September 25, 1925, at the hands of Frank McErlane.