7 January -
Dáil Éireann votes on the Treaty following
Arthur Griffith's motion for approval. The result is 64 in favour and 57 against.
10 February - The Treaty Bill is introduced in the
British House of Commons. It provides for the dissolution of the "Southern Ireland" parliament and the election of a parliament to which the Provisional Government will be responsible.
24 March -
McMahon killings: Five men, four wearing police uniforms, shoot all eight men in a Belfast Catholic household, killing six, in a reprisal attack for the previous killing of police officers.
1 April -
Arnon Street killings: Members of the police force murder six Belfast Catholic civilians in a revenge attack for the previous killing of a police officer.
18 September -
W. T. Cosgrave introduces the Constitution of Saorstát Éireann Bill to enable the implementation of the Treaty between
Great Britain and
Ireland.
5 December - UK Parliament enacts the Irish Free State Constitution Act, by which it legally sanctions the new
Constitution of the Irish Free State.
6 December - Twelve months after the signing of the Treaty the
Irish Free State officially comes into existence.
7 January -
Dáil Éireann votes on the Treaty following
Arthur Griffith's motion for approval. The result is 64 in favour and 57 against.
10 February - The Treaty Bill is introduced in the
British House of Commons. It provides for the dissolution of the "Southern Ireland" parliament and the election of a parliament to which the Provisional Government will be responsible.
24 March -
McMahon killings: Five men, four wearing police uniforms, shoot all eight men in a Belfast Catholic household, killing six, in a reprisal attack for the previous killing of police officers.
1 April -
Arnon Street killings: Members of the police force murder six Belfast Catholic civilians in a revenge attack for the previous killing of a police officer.
18 September -
W. T. Cosgrave introduces the Constitution of Saorstát Éireann Bill to enable the implementation of the Treaty between
Great Britain and
Ireland.
5 December - UK Parliament enacts the Irish Free State Constitution Act, by which it legally sanctions the new
Constitution of the Irish Free State.
6 December - Twelve months after the signing of the Treaty the
Irish Free State officially comes into existence.