when did the republic of ireland became independent
Republic of Ireland 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."[26] 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.
Partition of Ireland The Act of 1920 was intended to create two self-governing territories within Ireland, with both remaining within the United Kingdom. It also contained provisions for co-operation between the two territories and for the eventual reunification of Ireland. However, in 1922, following the War of Independence and the Anglo-Irish Treaty, the southern part became the Irish Free State, while Northern Ireland exercised its option to remain in the United Kingdom.