To be precise, immigrants from continental Europe began to settle in Ireland in 3000 BC. /kloc-entered the feudal society in the 0/2 century. Ireland itself was an independent country until it was invaded by Britain in 1 169. 1 17 1 year, King Henry II of England established his sovereignty over love. From 154 1, the king of England became the king of Ireland. /kloc-in 0/800, the United Kingdom of Great Britain and Ireland was established by signing the Treaty of Alliance with Britain, which was completely annexed by Britain. An anti-British "Easter Uprising" broke out in Dublin. With the upsurge of Irish national independence movement, the British government and Ireland signed the Anglo-Irish Treaty in February 192 165438, allowing 26 counties in southern Ireland to establish "free states" and enjoy autonomy. Six northern counties (now Northern Ireland) still belong to Britain. 1937, the Irish Constitution declared the "Free State" as a republic, but it remained in the Commonwealth. 1948 65438+February 2 1, the Irish parliament passed a law to declare its secession from the Commonwealth. 1April 949 18, Britain acknowledged its love for independence, but refused to return it to six northern counties.