- Easter Rising: Most significant Irish uprising since the rebellion of 1798; The beginning for Collins' rise to the top.
- Bloody Sunday: Eight IRA teams were assigned to eliminate the most effective detectives to Britain.
- Siege of Tralee: Black and Tans occupied the city of Tralee for nine days in response to Bloody Sunday.
- Anglo-Irish Treaty: England and Ireland sacrificed on both their parts to come to a compromise.
- Irish Civil War: The anti-treaty forces occupied the Four Courts complex in Dublin, waging war with the pro-treaty forces.
- Assassination: Collins was shot dead in his county of birth by his former comrades in arms.