Eamon de Valera (centre) strongly opposed the 1922 Anglo-Irish Treaty that brought about the partition of Ireland.
By the 20th century, a predominantly Catholic nationalism had become a potent force in Irish politics. Britain's unwillingness to agree to nationalist demands led to the Irish War of Independence, and later the Irish Civil War.
Search using Irish Independence Irish Republican Army (IRA) Government of Ireland Bill
- Canning, P., British Policy towards Ireland, 1921-41 (Oxford: Clarendon, 1985)
- Foster, R.F., Modern Ireland, 1600-1972 (London: Allen Lane, 1988)