Liam Deasy was born in Bandon, Co Cork in 1898, and he served as an IRA officer during the Irish War of Independence as commander of the 3rd Cork Brigade. In 1922, he rejected the Anglo-Irish Treaty, joining the Anti-Treaty forces to overthrow the Pro-Treaty Government. On 25 July-5–August 1922, Deasy led 2,000 IRA forces at the Battle of Kilmallock – the largest battle of the Irish Civil War – the IRA was defeated.
On 18 January 1923, Deasy was captured by Irish Free State troops near Clonmel, Co Tipperary and sentenced to death, although he was spared execution when he convinced his men to surrender as well. Deasy died in 1974 at the age of 76.