Although many Nationalists wanted Home Rule, some thought it was not good enough. Most members of the party Sinn Féin wanted Ireland to be completely separate from Great Britain. Sinn Féin became the most powerful party in 1916 and made their own government in Dublin, the Dáil Éireann. Irish Nationalists fought in the Irish War of Independence against the British government from 1919-1921. In 1920, Britain passed a law that said there would be two parliaments, one for Northern Ireland, and one for Southern Ireland. This was a form of Home Rule. However, the Southern Ireland parliament never met. The war did not end until the 1921 Anglo-Irish Treaty, which created the Irish Free State. The Irish Free State still had the same king as Britain, but had a separate government.