Northern Ireland national football team
In 1920, Ireland was partitioned into Northern Ireland and Southern Ireland. In 1922, Southern Ireland gained independence as the Irish Free State, later to become a republic under the name of Ireland. Amid these political upheavals, a rival football association, the Football Association of Ireland, emerged in Dublin in 1921 and organised a separate league and international team. In 1923, at a time when the home nations had withdrawn from FIFA, the FAI was recognised by FIFA as the governing body of the Irish Free State on the condition that it changed its name to the Football Association of the Irish Free State. The Irish FA continued to organise its national team on an all-Ireland basis.
Civil Authorities (Special Powers) Act (Northern Ireland) 1922
Partition was formally established with the Government of Ireland Act 1920. This also established the Parliament of Northern Ireland, which came into being the following year. Partition was followed by high levels of inter-communal violence, especially in Belfast. The Irish Republican Army, although it spent most of these years fighting in the Irish Civil War, aimed to use armed force to end partition and compel the United Kingdom to withdraw sovereignty from Northern Ireland.