Republic of Ireland
Revolution and steps to independence

Though it received the Royal Assent and was placed on the statute books in 1914, the implementation of the Third Home Rule Act was suspended until after the First World War which defused the threat of civil war in Ireland. With the hope of ensuring the implementation of the Act at the end of the war through Ireland's engagement in the war, Redmond and the Irish National Volunteers supported the UK and its Allies. 175,000 men joined Irish regiments of the 10th (Irish) and 16th (Irish) divisions of the New British Army, while Unionists joined the 36th (Ulster) divisions.

The remainder of the Irish Volunteers, who refused Redmond and opposed any support of the UK, launched an armed insurrection against British rule in the 1916 Easter Rising, together with the Irish Citizen Army. This commenced on 24 April 1916 with the declaration of independence. After a week of heavy fighting, primarily in Dublin, the surviving rebels were forced to surrender their positions. The majority were imprisoned, with fifteen of the prisoners (including most of the leaders) were executed as traitors to the UK. This included Patrick Pearse, the spokesman for the rising and who provided the signal to the volunteers to start the rising, as well as James Connolly, socialist and founder of the Industrial Workers of the World union and both the Irish and Scottish Labour movements. These events, together with the Conscription Crisis of 1918, had a profound effect on changing public opinion in Ireland against the British Government.

In January 1919, after the December 1918 general election, 73 of Ireland's 105 Members of Parliament (MPs) elected were Sinn Féin members who were elected on a platform of abstentionism from the British House of Commons. In January 1919, they set up an Irish parliament called Dáil Éireann. This first Dáil issued a declaration of independence and proclaimed an Irish Republic. The declaration was mainly a restatement of the 1916 Proclamation with the additional provision that Ireland was no longer a part of the United Kingdom. The Irish Republic's Ministry of Dáil Éireann sent a delegation under Ceann Comhairle (Head of Council, or Speaker, of the Daíl) Seán T. O'Kelly to the Paris Peace Conference of 1919, but it was not admitted.

After the War of Independence and truce called in July 1921, representatives of the British government and the five Irish treaty delegates, led by Arthur Griffith, Robert Barton and Michael Collins, negotiated the Anglo-Irish Treaty in London from 11 October to 6 December 1921. The Irish delegates set up headquarters at Hans Place in Knightsbridge, and it was here in private discussions that the decision was taken on 5 December to recommend the treaty to Dáil Éireann. On 7 January 1922, the Second Dáil ratified the Treaty by 64 votes to 57.

In accordance with the treaty, on 6 December 1922 the entire island of Ireland became a self-governing Dominion called the Irish Free State (Saorstát Éireann). Under the Constitution of the Irish Free State, the Parliament of Northern Ireland had the option to leave the Irish Free State one month later and return to the United Kingdom. During the intervening period, the powers of the Parliament of the Irish Free State and Executive Council of the Irish Free State did not extend to Northern Ireland. Northern Ireland exercised its right under the treaty to leave the new Dominion and rejoined the United Kingdom on 8 December 1922. It did so by making an address to the King requesting, "that the powers of the Parliament and Government of the Irish Free State shall no longer extend to Northern Ireland." The Irish Free State was a constitutional monarchy sharing a monarch with the United Kingdom and other Dominions of the British Commonwealth. The country had a governor-general (representing the monarch), a bicameral parliament, a cabinet called the "Executive Council", and a prime minister called the President of the Executive Council.
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