12 December 1920
Twelve cadets were injured in Cork, Ireland, when bombs were thrown into the lorry in which they were travelling. One of the cadets died of his injuries soon after the attack.
Reprisals began almost immediately to the attack on the cadets, with unionists setting fire to the city of Cork and destroying much of its business district.
The police discovered a bomb making factory and sufficient explosives in a cycle-repairing shop in Dublin to destroy the entire city.