Coniston massacre
The Coniston massacre, which took place near the Coniston cattle station in the then Territory of Central Australia (now the Northern Territory) from 14 August to 18 October 1928, was the last known officially sanctioned massacre of Indigenous Australians and one of the last events of the Australian Frontier Wars. People of the Warlpiri, Anmatyerre, and Kaytetye groups were killed. The massacre occurred in revenge for the death of dingo hunter Frederick Brooks, killed by Aboriginal people in August 1928 at a place now known as "Yukurru", also known as Brooks Soak.
Kevin O'Higgins
On Sunday 10 July 1927, O'Higgins was assassinated at the age of 35 on the Booterstown Avenue side of Cross Avenue in Dublin, while on his way to Mass at the Church of the Assumption in Blackrock, Dublin, by three anti-Treaty members of the IRA. Timothy Coughlan, Bill Gannon and Archie Doyle, in revenge for O'Higgins' part in the executions of 77 IRA prisoners during the civil war, shot the Minister dead.