Shortly after the rebellion , Michael Collins and others founded the Irish Republican Army ( IRA ) , which from 1916 to 1923 carried out numerous attacks against symbols of British power . For example , it attacked over 300 police stations simultaneously just before Easter 1920 , and , in November 1920 , publicly killed a dozen police officers and burned down the Liverpool docks and warehouses , an action that became known as Bloody Sunday
Bloody Sunday
Bloody Sunday (1920)
History of terrorism