12 May
1916
- James Connolly executed after the Easter Rising in Dublin, Ireland.
1926
- The 1926 General Strike, organized by the Trade Union Congress in the United Kingdom ends.
1968
- National Liberation Front of South Vietnam engages with Australian troops at FSB Coral in Bình Dương province, begining the Battle of Coral–Balmoral.
1981
- Francis Hughes dies on hunger strike in HM Prison Maze he is the second to die in the 1981 Irish Hunger Stike.