Winston Churchill calls for a "United States of Europe" in a 1947 speech. Over the following years, several organizations are founded to promote European unity and integration, including the European Federalists Union, United Europe Movement, French Council for a United Europe, Socialist United States of Europe Movement, and European Union of Christian Democrats. The Marshall Plan is also announced to provide economic support for post-war Europe.

2. September
19
Winston Churchill calls for a "kind of United States of Europe" in a
speech he gives at the University of Zurich.
December
17
The European Federalists Union is founded in Paris, France.

3. May
14
Fostered by Winston Churchill, the United Europe Movement is
created. It is hostile to supranational organs and in favour of
intergovernmental cooperation.
June
1
René Courtin creates the French Council for a United Europe that will
later be absorbed by the European Movement (1953). Fostered by
Christian Democrats, the Nouvelles Equipes Internationales, which
later known as the European Union of Christian Democrats (1965), is
created.
3
The Socialist United States of Europe Movement is created. In 1961 it
will be renamed European Left.

4. The Marshall Plan, set up for the economic revival of Europe, is
announced.
August
27-31
The European Union Federalists Congress is held in
Montreux, Switzerland.
December
13-14
Federalist and Unionist organisations meet within the International
Coordination of Movements for the Unification of Europe Committee.

5. January
1
The custom convention between Belgium, Luxembourg and the
Netherlands enters into force.
March
17
The Western Union Treaty (Brussels Treaty) is signed by
Belgium, France, Luxembourg, the Netherlands and the United Kingdom.

6. April
16
The Organisation for European Economic Cooperation (OEEC) is created to
coordinate the Marshall Plan.
May
7-11
Fostered by the International Coordination of Movements for the
Unification of Europe Committee, the Europe Congress meets in The
Hague, The Netherlands. It is chaired by Winston Churchill and is attended
by 800 delegates. Participants recommend that a European deliberative
assembly and a European special council be created to take charge of
preparing political and economic integration of European countries. They
also recommend the adoption of a human rights charter and the creation of a
Court of Justice to ensure the respect of such a charter.