Timeline of European Union history

This is a timeline of European Union history and its previous development.

Distinct periods

Individual years

European Coal and Steel Community

1950s
1952
1953
1954
1955
1956
1957

European Economic Community

1950s
1958
1959
1960s
1960
1961
1962
1963
1964
1965
1966

European Communities

1960s
1967
1968
1969
1970s
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980s
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990s
1990
1991
1992

European Union

2020s
2020
2021

Key events

Structural evolution

Since the end of World War II, sovereign European countries have entered into treaties and thereby co-operated and harmonised policies (or pooled sovereignty) in an increasing number of areas, in the so-called European integration project or the construction of Europe (French: la construction européenne). The following timeline outlines the legal inception of the European Union (EU)—the principal framework for this unification. The EU inherited many of its present responsibilities from the European Communities (EC), which were founded in the 1950s in the spirit of the Schuman Declaration.

Legend:
  S: signing
  F: entry into force
  T: termination
  E: expiry
    de facto supersession
  Rel. w/ EC/EU framework:
   de facto inside
   outside
                  European Union (EU) [Cont.]  
European Communities (EC) (Pillar I)
European Atomic Energy Community (EAEC or Euratom) [Cont.]      
/ / / European Coal and Steel Community (ECSC)  
(Distr. of competences)
    European Economic Community (EEC)    
            Schengen Rules European Community (EC)
'TREVI' Justice and Home Affairs (JHA, pillar II)  
  North Atlantic Treaty Organisation (NATO) [Cont.] Police and Judicial Co-operation in Criminal Matters (PJCC, pillar II)

Anglo-French alliance
[Defence arm handed to NATO] European Political Co-operation (EPC)   Common Foreign and Security Policy
(CFSP, pillar III)
Western Union (WU) / Western European Union (WEU) [Tasks defined following the WEU's 1984 reactivation handed to the EU]
     
[Social, cultural tasks handed to CoE] [Cont.]                
    Council of Europe (CoE)
Dunkirk Treaty¹
S: 4 March 1947
F: 8 September 1947
E: 8 September 1997
Brussels Treaty¹
S: 17 March 1948
F: 25 August 1948
T: 30 June 2011
London and Washington treaties¹
S: 5 May/4 April 1949
F: 3 August/24 August 1949
Paris treaties: ECSC and EDC
S: 18 April 1951/27 May 1952
F: 23 July 1952/—
E: 23 July 2002/—
Rome treaties: EEC² and EAEC
S: 25 March 1957
F: 1 January 1958
WEU-CoE agreement¹
S: 21 October 1959
F: 1 January 1960
Brussels (Merger) Treaty³
S: 8 April 1965
F: 1 July 1967
Davignon report
S: 27 October 1970
Single European Act (SEA)
S: 17/28 February 1986
F: 1 July 1987
Schengen Treaty and Convention
S: 14 June 1985/19 June 1990
F: 26 March 1995
Maastricht Treaty²,
S: 7 February 1992
F: 1 November 1993
Amsterdam Treaty
S: 2 October 1997
F: 1 May 1999
Nice Treaty
S: 26 February 2001
F: 1 February 2003
Lisbon Treaty
S: 13 December 2007
F: 1 December 2009
¹Although not EU treaties per se, these treaties affected the development of the EU defence arm, a main part of the CFSP. The Franco-British alliance established by the Dunkirk Treaty was de facto superseded by WU. The CFSP pillar was bolstered by some of the security structures that had been established within the remit of the 1955 Modified Brussels Treaty (MBT). The Brussels Treaty was terminated in 2011, consequently dissolving the WEU, as the mutual defence clause that the Lisbon Treaty provided for EU was considered to render the WEU superfluous. The EU thus de facto superseded the WEU.
²The treaties of Maastricht and Rome form the EU's legal basis, and are also referred to as the Treaty on European Union (TEU) and the Treaty on the Functioning of the European Union (TFEU), respectively. They are amended by secondary treaties.
³The European Communities obtained common institutions and a shared legal personality (i.e. ability to e.g. sign treaties in their own right).
⁴Between the EU's founding in 1993 and consolidation in 2009, the union consisted of three pillars, the first of which were the European Communities. The other two pillars consisted of additional areas of cooperation that had been added to the EU's remit.
⁵The consolidation meant that the EU inherited the European Communities' legal personality and that the pillar system was abolished, resulting in the EU framework as such covering all policy areas. Executive/legislative power in each area was instead determined by a distribution of competencies between EU institutions and member states. This distribution, as well as treaty provisions for policy areas in which unanimity is required and qualified majority voting is possible, reflects the depth of EU integration as well as the EU's partly supranational and partly intergovernmental nature.
⁶Plans to establish a European Political Community (EPC) were shelved following the French failure to ratify the Treaty establishing the European Defence Community (EDC). The EPC would have combined the ECSC and the EDC.

See also

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