Independence: 7 February 1992 (Maastricht Treaty signed establishing the European Union); 1 November 1993 (Maastricht Treaty entered into force)
note: the Treaties of Rome, signed on 25 March 1957 and subsequently entered into force on 1 January 1958, created the European Economic Community and the European Atomic Energy Community; a series of subsequent treaties have been adopted to increase efficiency and transparency, to prepare for new member states, and to introduce new areas of cooperation - such as a single currency; the Treaty of Lisbon, signed on 13 December 2007 and entered into force on 1 December 2009 is the most recent of these treaties and is intended to make the EU more democratic, more efficient, and better able to address global problems with one voice
Definition: For most countries, this entry gives the date that sovereignty was achieved and from which nation, empire, or trusteeship. For the other countries, the date given may not represent "independence" in the strict sense, but rather some significant nationhood event such as the traditional founding date or the date of unification, federation, confederation, establishment, fundamental change in the form of government, or state succession. For a number of countries, the establishment of statehood was a lengthy evolutionary process occurring over decades or even centuries. In such cases, several significant dates are cited. Dependent areas include the notation "none" followed by the nature of their dependency status. Also see the Terminology note.
Source: CIA World Factbook - This page was last updated on January 20, 2018