Britain had already passed an Irish Home Rule Act in 1914, suspended for the war's duration. However the 1916 Easter Rising in Dublin had led to increased support for the more radical Sinn Féin who in 1919 formed the First Dáil, effectively declaring Ireland independent, sparking the Irish War of Independence. Britain was to pass the Government of Ireland Act in late 1920, by which Ireland would have 2 home-ruled states within the British empire. This satisfied Wilson. The provisions of these were inadequate to the supporters of the Irish Republic, however, which claimed full sovereignty. This position was also supported by many Irish Americans. The American Committee for Relief in Ireland was set up in 1920 to assist victims of the Irish War of Independence of 1919–21. Some Irish-American Senators joined the "irreconcilables" who blocked the ratification of the Treaty of Versailles and United States membership in the League of Nations.