Page "1924 in organized crime" Paragraph 13
from
Wikipedia
* November 10-North Side Gang leader Dean O ' Banion is killed when three unidentified men enter his flower shop and shoot him several times.
This begins a five year gang war between the North Side Gang, under Hymie Weiss, against Al Capone's Chicago Outfit that would end with the St. Valentine's Day Massacre, in 1929.
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