1919 Irish War of Independence

In the years after the Easter Rising of 1916 in Ireland, a new independence movement emerged. In 1918-19 the political party Sinn Féin and its paramilitary partner, the Irish Republican Army, began a political struggle and an armed uprising against British rule. By 1922 the United Kingdom had lost a substantial portion of its territory, as the Irish Free State came amid a brutal civil war. At the same time, Ireland was partitioned, and a new unionist government was established in what was now Northern Ireland.