12 April 1927 (Royal and Parliamentary Titles Act establishes current name of the United Kingdom of Great Britain and Northern Ireland); notable earlier dates: 927 (minor English kingdoms united); 3 March 1284 ...
22 May 1990 (Republic of Yemen was established with the merger of the Yemen Arab Republic [Yemen (Sanaa) or North Yemen] and the Marxist-dominated People's Democratic Republic of Yemen [Yemen ...
none (became self-governing in free association with New Zealand on 4 August 1965 and has the right at any time to move to full independence by unilateral action)
... i> Treaties of Rome, which were signed on 25 March 1957 and entered into force on 1 January 1958, created the European Economic Community and the European Atomic Energy Community; the Treaty ...
12 November 1918 (republic proclaimed); notable earlier dates: 976 (Margravate of Austria established); 17 September 1156 (Duchy of Austria founded); 11 August 1804 (Austrian Empire proclaimed)