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The Maastricht Treaty, which led to the formation of the European Union, was signed by the member states of the European Communities.
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Maastricht Treaty
1992 founding treaty of the European Union
The Treaty on European Union, commonly known as the Maastricht Treaty, is the foundation treaty of the European Union (EU). Concluded in 1992 between the then-twelve member states of the European Communities, it announced "a new stage in the process of European integration"…Source: Wikipedia (CC BY-SA)
European Union
Supranational political and economic union
The European Union (EU) is a supranational political and economic union of 27 member states that are located primarily in Europe. The union has a total area of 4,233,255 km2 (1,634,469 sq mi) and an estimated population of over 450 million as of 2025. The EU is often described…Source: Wikipedia (CC BY-SA)
European Communities
Former international organizations governed by same set of institutions
The European Communities (EC) were three international organizations that were governed by the same set of institutions. These were the European Coal and Steel Community (ECSC), the European Atomic Energy Community, and the European Economic Community (EEC), the last of which…Source: Wikipedia (CC BY-SA)